Hypersurfaces can be defined and the extrinsic curvature and constraint equations can be evaluated. Support is provided for timelike, spacelike and null hypersurfaces in a four dimensional spacetime.

Junctions of two spacetime manifolds by the identification of a common hypersurface can be performed and the Darmois-Israel junction conditions can be calculated (for null hypersurfaces, the Barrabes-Israel conditions). The stress-energy of any resulting shell and equations for shell evolution can be determined.

A number of example worksheets are provided. In most cases they follow the examples provided in “A Relativist’s Toolkit” by Eric Poisson.

This update brings the features formerly found in the GRJunction package directly into GRTensorIII.

GRTensorIII is available on github at: https://github.com/grtensor/grtensor

GRTensorIII requires Maple (http://www.maplesoft.com/)

The hypersurface and junction documentation can be viewed at:

https://github.com/grtensor/grtensor/blob/master/doc/grHyper.pdf

Peter Musgrave

]]>SageManifolds is devoted to explicit tensor calculus (as opposed to “abstract tensor calculus”): the dimension of the manifold must be specified and some atlas must be provided. SageManifolds 1.0 functionalities include

– topological manifolds: charts, open subsets, maps between manifolds, scalar fields

– differentiable manifolds: tangent spaces, vector frames, tensor fields, curves, pullback and pushforward operators

– standard tensor calculus (tensor product, contraction, symmetrization, etc.), even on non-parallelizable manifolds

– taking into account any monoterm tensor symmetry

– exterior calculus (wedge product, exterior derivative, Hodge duality)

– Lie derivatives of tensor fields

– affine connections (curvature, torsion)

– pseudo-Riemannian metrics

– some plotting capabilities (charts, points, curves, vector fields)

Example of use, in particular in the context of general relativity, are posted at

http://sagemanifolds.obspm.fr/examples.html

Visit http://sagemanifolds.obspm.fr/ for free download and run.

Eric Gourgoulhon (on behalf of the SageManifolds team: http://sagemanifolds.obspm.fr/authors.html )

]]>Jorge V. Rocha is a theoretical physicist from Lisbon, Portugal, whose research interests revolve around gravitational theories and black holes. He completed his undergraduate studies with distinction at Instituto Superior Tecnico (IST) and obtained a PhD degree in Physics from University of California, Santa Barbara in 2008, under the supervision of Prof. Joseph Polchinski. He moved on to a first postdoctoral position with Prof. Vitor Cardoso in Centro Multidisciplinar de Astrofísica-IST. Since 2015, Jorge V. Rocha has been at Universitat de Barcelona with a Marie Sklodowska-Curie individual Fellowship, under supervision of Prof. Roberto Emparan.

]]>Nominations for the 2017 Bronstein Prize are invited. The nominee should hold a (non-faculty) post-doctoral position at the time of the nomination deadline. The primary criterion will be high quality of scientific results in loop quantum gravity, interpreted in the broadest sense, creativity and originality, and the significance of results to the field as a whole. The 2013 and 2015 winners of the prize were Drs. Eugenio Bianchi and Edward Wilson-Ewing, respectively

The nomination packet should consist of: i) A ~1 page nomination letter summarizing the specific achievements to date of the nominee; ii) A complete CV and a publication list of the nominee; iii) 2 letters of support from experts emphasizing the broad significance of all research contributions to date of the nominee; and, iv) A proposed citation. Self nominations will not be considered. The entire packet should be bundled into a single PDF file and e-mailed to Ms. Randi Neshteruk (rxh1[AT]psu.edu) by Tuesday, January 30th 2017.

The prize consisting of a certificate and a monetary reward will be presented during the Loops 2017 conference, which will be held at the University of Warsaw from July 3rd to 7th, 2017.

]]>The Gravitational Wave International Committee is pleased to announce that nominations for the 2016 GWIC Thesis Prize and for the 2016 Stefano Braccini Thesis Prize are now open. Both prizes recognize outstanding PhD theses in the general area of gravitational waves. To better serve the community, GWIC and the Friends of Stefano Braccini have moved to coordinate the two Prizes. There is a common call for nominations, and all theses submitted will be considered for both awards by a joint selection committee. Two winners will be selected, with the GWIC Thesis Prize emphasizing the impact of the research on the field of gravitational wave science, while the Braccini Thesis Prize will be awarded with an emphasis on innovation.

Members of the gravitational wave community are invited to nominate students who have performed notable research on any aspect of gravitational wave science. Theses will be judged on 1) originality and creativity of the research, 2) importance to the field of gravitational waves and gravitational wave detection, broadly interpreted, and 3) clarity of presentation. Each winner will receive a certificate of recognition and a prize of US$ 1,000.

GWIC is privileged to nominate both thesis prize winners for publication in the book series Springer Theses. Subject to certain qualifications, Springer Theses publishes exceptional Ph.D. theses in the physical sciences in their entirety. If accepted, each winner will receive an additional 500 Euros from Springer upon publication.

Eligibility: Both prizes are awarded on a calendar year basis. Theses should have been accepted by their institutions between 1 January 2016 and 31 December 2016. It is expected that many of the nominations will come from the member projects of GWIC, but this is not a requirement. Nominated theses may be in any language. A committee selected from the gravitational wave community will evaluate the nominations and select the winner. The selection committee will make all determinations about eligibility.

Nominations: Nominations should be submitted by 31 January 2017. The nomination package consists of (i) the thesis, (ii) a letter of nomination, preferably from the thesis advisor, and (iii) a supporting letter from another scientist familiar with the work. The nomination and supporting letters should describe the importance and novelty of the research and the student’s particular contribution.

Electronic submission of the thesis and letters is strongly preferred, with the thesis and the letters in separate pdf files. Electronic copies of the nomination materials may be sent to the Stan Whitcomb (stan[AT]ligo.caltech.edu). All submissions will be acknowledged; if an acknowledgement is not received shortly after the deadline, please contact the GWIC Secretary (gwic-exsec[AT]gravity.psu.edu).

If electronic submission is impossible, please contact the GWIC Secretary (gwic-exsec[AT]gravity.psu.edu) for instructions concerning paper submission.

]]>http://www.minkowskiinstitute.org/mip/books/ase-mtr.html

]]>With this open-access journal we hope to make the connection between the computational science and the astrophysics communities. In that respect I hope that you will enjoy reading these pioneering papers as much as I have enjoyed them. The following list of publications reflects only a small part of the range in scientific topics we seek for in this journal.

Recent articles:

– “Riemann solvers and Alfven waves in black hole magnetospheres” by B Punsly, D Balsara, J Kim and S Garain

– “In situ and in-transit analysis of cosmological simulations” by B Friesen, A Almgren, Z Lukic, G Weber, D Morozov, V Beckner and M Day

– “Achieving convergence in galaxy formation models by augmenting N-body merger trees” by A J Benson, C Cannella and S Cole

– “Simulations of stripped core-collapse supernovae in close binaries” by A Rimoldi, S Portegies Zwart and E M Rossi

If you are interested in submitting your own work to CompAC, you’ll find all the submission guidelines at the journal’s home page: http://comp-astrophys-cosmol.springeropen.com/

I look forward to reading your work.

Kind regards,

Simon Portegies Zwart

Editor-in-Chief

Computational Astrophysics and Cosmology

The CSE PhD program offers an excellent opportunity for students interested in an interdisciplinary program spanning applied mathematics, astrophysics, gravitational physics, large-scale simulation, and high-performance computing. Participating departments include Physics, Mathematics, Computer and Information Science, and Engineering. The CSE PhD program was created in 2011 and last year graduated its first class. We are committed to growing our PhD program with excellent students seeking an interdisciplinary, computationally-based research and educational experience.

Gravitational physics and computational astrophysics groups include faculty members Scott Field, Dana Fine, Robert Fisher, Jong-Ping Hsu, David Kagan, Gaurav Khanna, and Richard Price.

Funding is available on a competitive basis via university fellowships, research and teaching assistantships. Deadline for full consideration for Fall 2017 admission is February 15th. Interested students are encouraged to contact Gaurav Khanna (gkhanna[AT]umassd.edu) for more information.

To learn more about CSE faculty members, PhD students, and ongoing research projects please see:

http://cscvr.umassd.edu/

To learn more about the UMass Dartmouth gravity and astrophysics groups please see:

http://gravity.phy.umassd.edu/

https://sites.google.com/site/fishercompgroup/

To learn more about the CSE program please see:

http://www.umassd.edu/engineering/graduate/doctoraldegreeprograms/egrandappliedsciencephd/cseoption/

The following years Marcus Ansorg spent at the Institute of Theoretical Physics (Jena, Germany), at the Center for Gravitational Physics and Geometry at The Pennsylvania State University (USA), at the Max Planck Institute for Gravitational Physics (Albert Einstein Institute, Potsdam, Germany), and at the Helmholtz Center (Munich, Germany). While still in Jena, he developed novel numerical methods for the solution of the Einstein field equations with applications to rotating neutron stars. Marcus Ansorg’s spectral methods involving clever coordinate transformations improved the achievable accuracy by several orders of magnitude over previous methods. A further highlight during these years was his work on initial data for black holes, resulting in one of the most used data sets of its kind in numerical general relativity.

In 2010, Marcus Ansorg returned to the Friedrich Schiller University in Jena as Professor of Theoretical Physics / Theory of Gravitation. He was an enthusiastic lecturer and advisor, and his love of science and his productivity in general relativity remained undiminished. In recent years he successfully applied his numerical methods also in quantum field theory and quantum gravity.

Marcus Ansorg died after a severe illness, which prematurely ended his remarkable life and career. We mourn with his family the loss of a wonderful person and will honor and cherish his memory.

Bernd Bruegmann and Reinhard Meinel

]]>– interactive entry of spacetime metrics (including basis and NP formats)

– large number of standard tensor definitions (curvature tensors, vector field expansion/shear, scalar invariants)

– a powerful mechanism to define new tensor objects (grdef) without programming

– commands to simplify and extract component values

GRTensorIII is provided as a standard Maple package. It has been tested with Maple 2015 and 2016.

GRTensorIII is an update of the package GRTensorII developed by Peter Musgrave, Denis Pollney and Kayll Lake in the 1990s. GRTensorII has continued to be used by relativists and this update brings the package in line with “modern” Maple versions and fixes some platform-specific issues on MacOS. Most of the original code has been retained, with changes to allow it be released as a Maple module in a single package.

Peter Musgrave would like to thank Maple Software for the donation of Maple licenses. Thanks also to Eric Poisson for beta testing.

Peter Musgrave

Denis Pollney

Kayll Lake

Support: grtensor3[AT]gmail.com

]]>(1) We will make these Awards on May 15, 2017 for the best well-written essays, 1500 words or fewer (excluding abstracts and excluding a small number of equations, diagrams, figures, references and tables), on the subject of gravitation, its theory, applications, or effects. Essay ideas should be self-contained and understandable – not dependent on reading other documents.

(2)

The First Award will be $4000.00

The Second Award will be 1250.00

The Third Award will be 1000.00

The Fourth Award will be 750.00

The Fifth Award will be 500.00

(3) Essay must be in English and e-mailed in a single PDF file before April 1, 2017. One essay only will be accepted from each author. Notify us within 24 hours if you do not receive an e-mail confirmation of your submission.

(4) Title page should include essay title; authorsﾕ names (specify corresponding author), e-mail and mailing addresses; submission date; an abstract of 125 words or fewer; and the statement: Essay written for the Gravity Research Foundation 2017 Awards for Essays on Gravitation. Pages should be numbered.

(5) The decision of the judges will be final and no reviews or comments will be provided.

(6) Please check the winnersﾕ announcement to be posted on our website: www.gravityresearchfoundation.org around May 15, 2017. We will also attempt to send all participants a general e-mail notification.

(7) The five award-winning essays will be published in a special issue of the International Journal of Modern Physics D (IJMPD). Authors of essays designated Honorable Mention will be invited to submit their essays to the IJMPD where these may undergo additional refereeing at editorial discretion for possible publication. Authors of all other essays are free and encouraged to publish their essays after May 15th.

Submission e-mail address: George M. Rideout, Jr., President, grideoutjr[AT]aol.com

Recent First Award Winners:

2016 – Stephen L. Adler, Institute for Advanced Study, Princeton, New Jersey

2015 – Gerard ﾕt Hooft, Utrecht University and Spinoza Institute, the Netherlands

2014 – Lawrence M. Krauss, Arizona State University and Frank Wilczek, Massachusetts Institute of Technology (MIT)

2013 – Baocheng Zhang, Qing-yu Cai, Ming-sheng Zhan, Chinese Academy of Sciences, Wuhan and Li You, Tsinghua University, Bejing, PR China

2012 – Claus Kiefer and Manuel Kraemer, University of Cologne, Koeln, Germany

2011 – Ivan Agullo, Penn State and Leonard Parker, University of Wisconsin-Milwaukee

2010 – Mark Van Raamsdonk, University of British Columbia, Vancouver

2009 – Alexander Burinskii, Russian Academy of Sciences, Russia

2008 – T. Padmanabhan, IUCAA, Pune, India

2007 – S. Carlip, University of California at Davis

2006 – Vijay Balasubramanian, University of Pennsylvania; Donald Marolf, University of California at Santa Barbara and Moshe Rozali, University of British Columbia

2005 – John Ellis, CERN; N. E. Mavromatos, Kingﾕs College London and D. V. Nanopoulos, Texas AandM University

2004 – Maulik Parikh, Columbia University, New York

2003 – Martin Bojowald, The Pennsylvania State University

2002 – Steven B. Giddings, University of California at Santa Barbara and Stanford University

Bishop, N.T. and Rezzolla, L.,

“Extraction of gravitational waves in numerical relativity”,

Living Rev Relativ (2016) 19: 2.

http://doi.org/10.1007/s41114-016-0001-9

ABSTRACT:

A numerical-relativity calculation yields in general a solution of the Einstein equations including also a radiative part, which is in practice computed in a region of finite extent. Since gravitational radiation is properly defined only at null infinity and in an appropriate coordinate system, the accurate estimation of the emitted gravitational waves represents an old and non-trivial problem in numerical relativity. A number of methods have been developed over the years to “extract” the radiative part of the solution from a numerical simulation and these include: quadrupole formulas, gauge-invariant metric perturbations, Weyl scalars, and characteristic extraction. We review and discuss each method, in terms of both its theoretical background as well as its implementation. Finally, we provide a brief comparison of the various methods in terms of their inherent advantages and disadvantages.

Diverse Toolset: To achieve your goals, you will choose to focus on applied inverse problems; biomedical mathematics; discrete mathematics; dynamical systems and fluid dynamics; or geometry, relativity, and gravitation.

]]>As an affiliated commission (AC2) of the International Union of Pure and Applied Physics (IUPAP), the International Society on General Relativity and Gravitation (ISGRG) offers an annual IUPAP Young Scientist Prize. The IUPAP Young Scientist Prizes recognize outstanding achievements of scientists at early stages of their career. Each prize consists of a certificate citing the contributions made by the recipient, a medal and 1000 euros.

The conditions for the prize are:

The IUPAP General Relativity and Gravitation Young Scientist Prize can be for work in any area of relativity and gravitation, theoretical or experimental.

On 1 February 2017, nominees must have a maximum of eight years of research experience (excluding career interruptions) following the Ph.D. (or equivalent) degree. They are expected to have displayed significant achievement and exceptional promise for future achievements in relativity and gravitation.

THE PRIMARY NOMINATOR MUST BE A MEMBER OF THE INTERNATIONAL SOCIETY ON GENERAL RELATIVITY AND GRAVITATION.

Nominations may be made by any member of ISGRG (other than the nominee) and should be accompanied by a CV, a proposed citation of 30-50 words summarizing the reason for the nomination, a list of publications and a description (about one page long) of the specific achievements of the nominee, who need not be an ISGRG member.

It is important that the selection committee has specific information that allows it to determine what the nominee has contributed and how this will impact the subject. Therefore it will be extremely helpful to the selection committee to receive at least two additional letters supporting the nomination that detail the expected significance of the contributions of the nominee.

It is also appropriate to submit additional materials such as published articles. In the case of co-authored or multi-authored publications, it is essential for nominators and supporters to discuss the nominee’s precise contributions, if known, in addition to the work’s overall significance.

The entire package should be bundled into a single PDF file and emailed to the Secretary of ISGRG, beverlyberger[AT]me.com, by 1 February 2017. The winner will be announced on 14 March 2017 and the award made shortly thereafter. The official presentation of the award will be made at the GR22 conference in 2019.

]]>We are writing to you about some news that you might be interested in with respect to LIGO and Virgo observing runs.

In the expectation of regular future gravitational wave detections, the LIGO Scientific Collaboration (LSC) and the Virgo Collaboration are seeking the help of numerical relativity groups in validating and interpreting gravitational wave signals. The immediate goal is rapid production of simulations of binary black hole coalescences in response to future detections. Gravitational waveforms from these simulations will be used to quantify accuracy of analytical waveform models, and in studies of systematic biases in parameter estimation and tests of general relativity. The simulations may also provide visualizations of binary black holes for outreach purposes. For details please see: (https://dcc.ligo.org/LIGO-T1600380/public)

Participating groups will join the LIGO Scientific Collaboration or the Virgo collaboration following rules of each collaboration; for joining LSC as a member see (http://ligo.org/about/join.php) or email gabriela.gonzalez[AT]ligo.org; for signing a memorandum of understanding focused on this specific subject with Virgo (http://ww.virgo-gw.eu) e-mail fulvio.ricci[AT]roma1.infn.it. Joining groups will perform simulations, coordinated within the LVC working groups ‘Compact Binary Coalescence’ and ‘Burst’.

Given the rapid flux in the emerging field of gravitational wave astronomy, the scope of this announcement is limited to the second observing run, which is scheduled to run approximately from December 2016 to mid-2017. This call for membership is primarily targeting vacuum general relativity. If interested please contact the LIGO or Virgo spokespersons as soon as possible. Please feel free to share this information with your colleagues or recommend names of other groups that may be interested. Thanks in advance for your interest.

Gabriela Gonzalez (LIGO Scientific Collaboration spokesperson)

Fulvio Ricci (Virgo Collaboration spokesperson)

Dietrich was born on May 24, 1939 in Weida/Thuringia and discovered his interest in the sciences early on. He was a student at the University of Jena from 1957 to 1962 and earned his Diplom in Physics with honours. At that time, Prof. Schuetz held experimental physics, Prof. Eckardt Technical Physics, Prof. Schuster and Drs Schmutzer and Weber Theoretical Physics. In 1966, he received his doctorate with a dissertation entitled “Bispinor Fields in Curved Spaces” with Prof. Ernst Schmutzer as his supervisor, whom Dietrich Kramer held in high esteem throughout his life. He then turned his research attention to exact solutions of Einstein’s field equations, a field in which he received international acclaim. The year 1980 was marked by particular success, when he was awarded a prize from the Gravity Research Foundation for the article “Soliton Concept in General Relativity”, was invited to hold a plenary lecture at the GR9 conference, and Cambridge University Press published the monograph “Exact Solutions of Einstein’s Field Equations” that he had co-authored with Stephani, MacCallum and Herlt – still a highly cited standard work.

In 1970, Dietrich Kramer received his habilitation with a thesis on “Invariance Transformations of Exact Vacuum Solutions in General Relativity”, which marked the beginning of his long-standing teaching activities and duties at the Department of Physics in Jena. The long overdue professorship was given to him in 1992 after the German reunification. In the decade that followed, he continued his successful research and teaching career. In addition, he also took on administrative responsibilities such as Director of the Theoretical Physics Institute that was now open to scientists from both sides of the former iron curtain and attracted guests from around the world.

Prof. Dietrich Kramer passed away on August 30, 2016 after a protracted illness. He will be fondly remembered by all his colleagues and students as a deeply caring and dedicated person.

Gernot Neugebauer and Reinhard Meinel

]]>This book offers a systematic exposition of conformal methods and how they can be used to study the global properties of solutions to the equations of Einstein’s theory of gravity. It shows that combining these ideas with differential geometry can elucidate the existence and stability of the basic solutions of the theory. Introducing the differential geometric, spinorial and PDE background required to gain a deep understanding of conformal methods, this text provides an accessible account of key results in mathematical relativity over the last thirty years, including the stability of de Sitter and Minkowski spacetimes. For graduate students and researchers, this self-contained account includes useful visual models to help the reader grasp abstract concepts and a list of further reading, making this the perfect reference companion on the topic.

Length: 622 pages, contains 73 b/w illustrations.

ISBN: 9781107033894

Organisers:

NISSANKE, Samaya (chair)

FENDER, Rob

KULKARNI, Shri

OFEK, Eran

DAVIES, Melvyn

FYNBO, Johan

1. All presentations during the Chalonge – de Vega 20th Paris Cosmology Colloquium 2016 are available on line in pdf format in “Programme and Lecturers .pdf ” here:

http://chalonge.obspm.fr/Programme_Paris2016.html

http://chalonge.obspm.fr/colloque2016.html

Contents: Peter Biermann , Maria Cristina Falvella, Anastasia Fialkov, Gerard Gilmore, Mattew Greenhouse, Dmytro Iakubovskyi, Anthony Lasenby, Nicola Menci, Felix Mirabel, Sinziana Paduroiu, Paolo Salucci, Norma G. Sanchez, George F. Smoot, Benjamin Wandelt Casey Watson, Christian Weinheimer.

The Album of Pictures of the Colloquium is available here:

http://chalonge.obspm.fr/album2016/index.html

http://chalonge.obspm.fr/colloque2016.html

2. The Hector J. DE VEGA MEDAL was presented and awarded. A Summary of the medal presentations is available here:

http://chalonge.obspm.fr/HectordeVegaMedal.pdf

3. The HIGHLIGHTS and CONCLUSIONS of the Meudon Workshop 2016: Warm Dark Matter Astrophysics in Agreement with Observations and keV Sterile Neutrinos is available here: http://chalonge.obspm.fr/Highlights_and_Conclusions_CIAS2016.pdf

On line presentations of the Meudon WDM Workshop

http://chalonge.obspm.fr/Programme_CIAS2016.html

http://chalonge.obspm.fr/Cias_Meudon2016.html

4. The full Programme 2016 and Sessions:

http://chalonge.obspm.fr/Programme2016.html

We thank all again, for having contributed so much to these meetings and we look forward to seeing you again in the next events of this series.

With Compliments and kind regards

http://chalonge.obspm.fr/HdeV.html

Norma G. Sanchez and the Chalonge de Vega School Team

http://chalonge.obspm.fr/.

]]>More details are available on: http://ktwig.fuw.edu.pl/1,1,53,loops17.html

The local organizing committee can be contacted by email on: Loops17[AT]fuw.edu.pl

]]>Publish your next paper in CQG for the chance to be selected for next year’s Highlights.

https://mc04.manuscriptcentral.com/cqg-iop

We have extended the deadline to submit an abstract to our conference

“Varying Constants and Fundamental Cosmology” – VARCOSMOFUN’16

(September 12 – 17, 2016, Szczecin, Poland)

to July 15, 2016.

The topics of the conference are:

Special topic: Varying constants – theory, laboratory experiments, astronomical observations.

Further topics: Modified gravity, Quantum cosmology, Quantum entanglement, Multiverse, Anthropic principle, Dark matter – theory and experiment, Dark energy – theory and observations, Inflation and large-scale structure, Early Universe, Gravitational waves, Cosmic Microwave Background

More information is available on our website:

https://indico.cern.ch/e/varcosmo16

Yours faithfully,

Mariusz P. Dabrowski

(Organizing Committee chair)

http://bit.ly/294Uh4J

In each volume, a few papers are marked as “Editor’s Choice”. The primary criteria is original, high quality research that is of wide interest within the community. We would also like to introduce Springer’s new article interface, optimized for easy reading on mobile devices.

General Relativity and Gravitation is a journal devoted to all aspects of modern gravitational science, and published under the auspices of the ISGRG. The journal publishes research letters and papers, invited review articles on all theoretical and experimental aspects of modern general relativity and gravitation, as well as book reviews and historical articles of special interest.

We welcome your submissions, and see you at GR21!

]]>The Chalonge de Vega 20th Paris Cosmology Colloquium 2016:

The Universe of CMB, Warm Dark Matter, Dark Energy and keV Sterile Neutrinos

Place: Historic Perrault building, Observatoire de Paris at Paris

Dates: 20, 21 and 22 July 2016

URL: http://chalonge.obspm.fr/colloque2016.html

So far, not a single valid objection arose against WDM.

A Turning Point operated in the last years in the Dark Matter research: Warm Dark Matter (WDM) emerged impressively over Cold Dark Matter (CDM) as the leading Dark Matter candidate. WDM solves naturally the problems of CDM and CDM + baryons , provides the same large scale and CMB results than ΛCDM and agrees with the observations at the galactic and small scales.

Warm Dark Matter (WDM) is hot topic in galaxies and cosmology and implies novelties in the astrophysical, cosmological, particle physics and nuclear physics context. Warm Dark Matter Cosmology (LambdaWDM) is a more complete, correct and general theory than Cold Dark Matter (LambdaCDM) because it contains CDM as a limiting case, reproduces LambdaCDM at large scales and solves all the known problems of CDM at small and intermediate scales.

This Colloquium addresses the last progresses in the LambdaWDM Standard Model of the Universe. with the CMB, dark matter, dark energy, the new WDM framework to galaxy formation, and the effective theory of the early universe inflation with predictive power. The Colloquium addresses as well the theory and experimental search for the WDM particle physics candidates (keV sterile neutrinos). Astrophysical constraints put the sterile neutrino mass m in the range 1

1. $4,000 – A Frame-Dependent Gravitational Effective Action Mimics a Cosmological Constant, but Modifies the Black Hole Horizon by Stephen L. Adler, Institute for Advanced Study, Einstein Drive, Princeton, NJ 08540; e-mail: adler[AT]ias.edu

2. $1,250 – New Insights into Quantum Gravity from Gauge/Gravity Duality by Netta Engelhardt and Gary T. Horowitz, Department of Physics, University of California, Santa Barbara, CA 93106; e-mail: engeln[AT]physics.ucsb.edu, gary[AT]physics.ucsb.edu

3. $1,000 – Spontaneous Dimensional Reduction in Quantum Gravity by S. Carlip, Department of Physics, University of California, Davis, CA 95616; e-mail: carlip[AT]physics.ucdavis.edu

4.$750 – Quadratic Gravity: from Weak to Strong by Bob Holdom and Jing Ren, Department of Physics, University of Toronto, Toronto, Ontario, Canada M5S1A7; e-mail: bob.holdom[AT]utoronto.ca, jren[AT]physics.utoronto.ca

5. $500 – Axion Experiments to Algebraic Geometry – Testing Quantum Gravity via the Weak Gravity Conjecture by Ben Heidenreich, Matthew Reece, and Tom Rudelius, Department of Physics, Harvard University, Jefferson Laboratory, 17 Oxford St., Cambridge, MA, 02138; e-mail: bjheiden[AT]physics.harvard.edu, mreece[AT]physics.harvard.edu, rudelius[AT]physics.harvard.edu

Selected for Honorable Mention this year were (listed in alphabetical order): Ahmed Farag Ali and Saurya Das; Shreya Banerjee, Sayantani Bera, and Tejinder P. Singh; David Berenstein and Alexandra Miller; Evan Berkowitz, Masanori Hanada, and Jonathan Maltz; Matthias Blau and Martin O’Loughlin; Martin Bojowald; Yuri Bonder; Sumanta Chakraborty and Kinjalk Lochan; Lay Nam Chang, Djordje Minic, Chen Sun, and Tatsu Takeuchi; Alessandro Codello and Rajeev Kumar Jain; Geoffrey Compere; F. I. Cooperstock; Roberto Emparan and Marina Martinez; Willy Fischler and Sandipan Kundu; Steven B. Giddings; Eduardo Guendelman, Emil Nissimov, and Svetlana Pacheva; Hal M. Haggard and Carlo Rovelli; Shahar Hod; A. Landry and M. B. Paranjape; Philip D. Mannheim; Samir D. Mathur; T. Padmanabhan and Hamsa Padmanabhan; Don N. Page; Susha L. Parameswaran and Ivonne Zavala; Tsvi Piran; M. M. Sheikh-Jabbari; Douglas Singleton and Steve Wilburn; W. M. Stuckey, Timothy McDevitt, and Michael Silberstein; Tanmay Vachaspati.

This announcement and abstracts of award-winning and honorable mention essays will be posted when ready on our web site, http://www.gravityresearchfoundation.org. The five award-winning essays will be published in a special issue of the International Journal of Modern Physics D (IJMPD). They will also be posted at a later date on our web site.

]]>It is with profound sadness that we report on the sudden passing away of Professor Sergio Dain, an Associate Editor of the journal General Relativity and Gravitation. He succumbed to cancer on February 24th, 2016. Although only 46, he had already been an internationally recognized relativist for quite some time.

Sergio received his Ph.D. from the Universidad Nacional de Cordoba, Argentina in 1999 for his numerous contributions to asymptotically flat space-times and gravitational radiation. Part of his thesis work was carried out at the Max Planck Institute for Gravitational Physics (Albert Einstein Institute – AEI) in Golm, Germany, under the auspices of a Fellowship of the German Academic Exchange Service. In 2000 he returned to AEI as a post-doctoral research scientist in the Mathematical General Relativity group and remained there till 2007. During this period he made a transition to geometric analysis, specializing in elliptic aspects of Einstein’s equations. His very first paper in the area, published as a single author Physical Review Letter, provided a family of initial data representing two spinning black holes. This was followed by a series of papers on conserved quantities in black hole collisions, the close limit approximation, and initial data sets tailored to isolated horizon boundary conditions. He then turned his attention to angular momentum, writing a series of seminal papers establishing inequalities between angular momentum and mass in general relativity. Many of these papers were written after he returned to Cordoba as a faculty member and an independent researcher with CONICET.

These influential contributions were recognized by the International Society on General Relativity and Gravitation through an invitation to give a plenary lecture on the subject during the GR20 and Amaldi10 conference, held at Warsaw in 2013, and by the Fields Institute at Toronto, where he gave two invited lectures on the subject in 2015. He was fully engaged in first rate research until the very end. Indeed, his last paper, establishing sharp bounds on the minimum radius of a charged spherical body in general relativity, appeared in Physical Review D on February 23rd, 2016! It not only contains a hard theorem, but also some numerical simulations and a nice discussion of physical implications – a testimony of Sergio’s intellectual breadth.

Sergio was very engaged in the promotion of Science in Argentina at different levels. In particular, he led the Max Planck partner group at the Universidad Nacional de Cordoba from 2007 to 2012, where he also organized a series of international conferences. Ten students received their graduate degrees under his supervision and he also mentored 4 post-doctoral researchers. Since January 2014, he served on the Editorial Board of General Relativity and Gravitation. He made important contributions to the journal, remaining active on the Board till the very end. The Board fondly remembers him for his spontaneous sense of humor, his uplifting spirit and his passion for general relativity. The Board and Springer deeply regret that the journal will no longer receive his energetic contributions. We extend our sympathies to his family and many friends.

Abhay Ashtekar

Roy Maartens

(Editors in Chief)

Please send messages to: mayg[AT]bnu.edu.cn

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