Tag Archives: neutron stars

Accretion in Strong Gravity, Bad Honnef, Germany

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The guiding theme of this seminar is the observation, the modelling and the theoretical description of accretion processes in systems where gravity is strong and nonlinear. Accreting matter are the objects which most closely approach compact objects like black holes or neutron stars and, therefore, are an ideal laboratory to explore the effects of strong gravity. Recently technological developments in observation techniques lead to a strongly improved accuracy in observing accretion discs and related phenomena. This trend will be continued in the next years, for instance with observations of ALMA and the James-Webb telescope, but also with survey telescopes like PanSTARRS or LSST. This development has to be paralleled by the theoretical description and modelling.

Basic open questions in accretion disc physics which will be discussed in this seminar include the description of viscosity and turbulence, in particular in the relativistic context, the effective equations of accretion, evolution of supermassive black holes, accretion discs in generalised theories of gravity, and GRMHD simulations. Summarized, the topics of this seminar are

Observation of astrophysical accretion and related phenomena
The basic equations of accretion and their structure
Applications to accretion discs and the accretion process
Numerical simulation of accretion in strong gravity

Confirmed invited speakers are so far
Prof. Dr. Axel Brandenburg
Prof. Dr. Wolfgang Duschl
Prof. Dr. Andreas Eckart
Prof. Dr. Jose Antonio Font
Prof. Dr. Domenico Giulini
PD Dr. Rodion Groll
Prof. Dr. John Hawley
Dr. Eva Hackmann
Dr. Tobias Illenseer
Prof. Dr. Vladimir Karas
Prof. Dr. Jutta Kunz
Prof. Dr. Claus Laemmerzahl
Prof. Dr. Shin Mineshige
Dr. Monika Moscibrodzka
PD Dr. Volker Perlick
Dr. Daniela Pugliese
Prof. Dr. Luciano Rezzolla
Prof. Dr. Paul Romatschke
Dr. Oldrich Semerak
Dr. Odele Straub

There is no conference fee. The Wilhelm and Else Heraeus-Foundation bears the cost of full-board accommodation for all participants. Up to 75 persons including invited speakers can participate in the seminar. To express your interest in the conference please fill the application form on our website, https://www.we-heraeus-stiftung.de/veranstaltungen/seminare/2019/accretion-in-strong-gravity/application/ or contact us directly.

PHAROS PhD training school on multi-messenger physics and astrophysics with compact binaries, Jena, Germany

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The first PHAROS COST action CA16214 [1] PhD training school on multi-messenger physics and astrophysics with compact binaries will be held in Jena (Germany) from Monday March 11 to Friday March 15 2019 [2].

The goal of the school is to contribute to the training of the next generation of scientists that will face the problem of interpreting multimessenger signals from compact binaries composed of neutron stars in the coming years. The school is aimed primarily at students and early career researchers and covers the following topics:

* Observational aspects.
– Current and future observatories, their operational mode, and the network organization.
– Main observables and their connection to astrophysical phenomena and sources.
– Relations between the sources and the emission mechanisms in the different bands and channels (gravitational, electromagnetic and neutrinos).
– Observational constraints on neutron star and merger remnant properties, and on the dense matter equation of state.

* Theoretical modeling.
– Formation channels of compact binaries; masses distributions and rates.
– Coalescence dynamics and gravitational signals from general and numerical relativity.
– High-energy astrophysical phenomena; short gamma-ray burst and kilonova modeling and their connection to the strong-field dynamics.
– Role of nuclear and weak interactions in the merger dynamics and remnant; status and challenges of physical input models for theory and simulations.

* Data analysis.
– Bayesian methods and standard tools employed by different communities.
– Shared frameworks for multi-messenger data analysis: status and perspectives.
– Data reduction and observational inputs.
– Input from theoretical modeling: models requirements and interpretation challenges.

Lecturers

* ARCONES Almudena (Darmstadt U/GSI)
* FORTIN Morgan (CAMK)
* HINDERER Tanja (Radboud U)
* MAPELLI Michela (Padova U)
* MESSENGER Chris* (Glasgow)
* OHME Frank (AEI Hannover)
* PEREGO Albino (INFN)
* SHIBATA Masaru (AEI/Kyoto)
*TANVIR Nial (University of Leicester)

There is no registration fee, but online registration before January 10, 2019 is required. Due to space limitations, attendance at the school is limited to approximately 100 people. Partial support for local housing and travel is available upon request. Participants desiring support should apply filling the online registration form [2].

Scientific Organizing Commitee

* ANDERSSON Nils (Southampton U)
* BERNUZZI Sebastiano (Jena U)
* BRUEGMANN Bernd (Jena U)
* HANNAM Mark (Cardiff U)
* HASKELL Brynmor (CAMK)
* MEINEL Reinhard (Jena U)
* NISSANKE Samaya (UvA)
* OERTEL Micaela (Meudon)
* ROWLINSON Antonia (UvA)
* REA Nanda (CSIC)
* TOLOS Laura (Frankfurth Goethe U)

[1] http://www.pharos.ice.csic.es/
[2] https://indico.tpi.uni-jena.de/event/2/overview

3rd HEL.A.S. Summer School and DAAD School “Neutron Stars and Gravitational Waves”, Thessaloniki, Greece (2nd announcement)

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3rd HEL.A.S. SUMMER SCHOOL AND DAAD SCHOOL

NEUTRON STARS AND GRAVITATIONAL WAVES

OCTOBER 8-12, 2018
THESSALONIKI, GREECE

Important dates: Early registration: 20/8/2018 ; Late registration: 10/9/2018

SECOND ANNOUNCEMENT

With the detection of the binary black hole merger GW150914, we have entered the era of Gravitational Wave Astronomy, while the detection of the binary neutron star merger GW170817 was the first example of Gravitational Wave Multi-messenger observations. In the coming years, additional science runs with the LIGO and VIRGO detectors are expected to lead to exciting new discoveries, with KAGRA and LIGO-India subsequently joining the existing detectors and forming a global network. In parallel, new upgrades and new detectors are planned, whereas space-born gravitational wave detectors, such as LISA, are under intense development.

The main goal of this school is to provide an introduction to the foundations of Gravitational Waves, including theory, numerical simulations, principles of detection and astrophysical implications. Neutron Stars will be discussed in detail as one of the prime sources of gravitational waves, emphasizing the key role that gravitational wave astronomy can play in constraining the theory of gravity observationally.

The Aristotle University of Thessaloniki will welcome around 30 MSc and PhD students to attend the summer school, which will introduce them to key concepts in this exciting field as well as provide them with an opportunity to interact with experts. Advanced undergraduate students that are engaged in research projects related to the theme of the summer school may also apply.

The program of the summer school will consist of several 90’ minutes lectures on each morning, with additional exercise-style lectures and talks by members of the DAAD collaboration on each afternoon. Indicative titles for the lectures are:

1) Theory of gravitational waves
2) Compact object oscillations and GW asteroseismology
3) Constraints on the neutron star equation of state
4) Magnetars and core-collapse supernovae
4) Compact objects in alternative theories of gravity
5) GW detectors: LIGO/VIRGO and planned 3rd generation detectors
6) LISA mission and science

Lecturers:

Pau Amaro-Seoane (Barcelona)
Theocharis Apostolatos (Athens)
Andreas Bauswein (HITS-Heidelberg / Darmstadt)
Katerina Chatziioannou (CITA Toronto)
Michael Gabler (MPA-Garching)
Stavros Katsanevas (EGO Director)
Kostas Kokkotas (Tuebingen)
Georgios Lalazisis (Thessaloniki)
Nikolaos Stergioulas (Thessaloniki)

The school will take place at the Aristotle University of Thessaloniki. Partial grants for local expenses to a limited number of participants are provided by the Hellenic Astronomical Society (HEL.A.S.). The school is supported by the Aristotle University of Thessaloniki, by the Department of Physics and by the Section of Astrophysics, Astronomy and Mechanics. The school is also supported by a DAAD grant for the academic collaboration between the relativity groups of the Aristotle University of Thessaloniki and the University of Tuebingen.

A number of rooms at selected hotels have been reserved at special prices. Please note that the block reservation will be valid only until August 30, 2018, so it is advisable to make your reservation as soon as possible. After that, rooms and prices will depend on the availability of each hotel.

We are looking forward to meeting all interested participants in Thessaloniki in October!

With our best regards,

The Organizing Committee

K. Kokkotas
N. Stergioulas
P. Iosif
G. Tantilian
N. Tryfonidis
S. Vretinaris

3rd HEL.A.S. Summer School and DAAD School “Neutron Stars and Gravitational Waves”, Thessaloniki, Greece

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3rd HEL.A.S. SUMMER SCHOOL AND DAAD SCHOOL
NEUTRON STARS AND GRAVITATIONAL WAVES

OCTOBER 8-12, 2018, THESSALONIKI, GREECE

Important deadlines: Early registration: 31/7/2018; Late registration: 31/8/2018.

FIRST ANNOUNCEMENT

With the detection of the binary black hole merger GW150914, we have entered the era of Gravitational Wave Astronomy, while the detection of the binary neutron star merger GW170817 was the first example of Gravitational Wave Multi-messenger observations. In the coming years, additional science runs with the LIGO and VIRGO detectors are expected to lead to exciting new discoveries, with KAGRA and LIGO-India subsequently joining the existing detectors and forming a global network. In parallel, new upgrades and new detectors are planned, whereas space-born gravitational wave detectors, such as LISA, are under intense development.

The main goal of this school is to provide an introduction to the foundations of Gravitational Waves, including theory, numerical simulations, principles of detection and astrophysical implications. Neutron Stars will be discussed in detail as one of the prime sources of gravitational waves, emphasizing the key role that gravitational wave astronomy can play in constraining the theory of gravity observationally.

The Aristotle University of Thessaloniki will welcome around 30 MSc and PhD students to attend the summer school, which will introduce them to key concepts in this exciting field as well as provide them with an opportunity to interact with experts. Advanced undergraduate students that are engaged in research projects related to the theme of the summer school may also apply.

The program of the summer school will consist of several 90’ minutes lectures on each morning, with additional exercise-style lectures and talks by members of the DAAD collaboration on each afternoon. Indicative titles for the lectures are:

1) Theory of gravitational waves
2) Compact object oscillations and GW asteroseismology
3) Constraints on the neutron star equation of state
4) Magnetars and core-collapse supernovae
4) Compact objects in alternative theories of gravity
5) GW detectors: LIGO/VIRGO and planned 3rd generation detectors

Lecturers:

Theocharis Apostolatos (Athens)
Andreas Bauswein (HITS-Heidelberg / Darmstadt) (TBC)
Katerina Chatziioannou (CITA Toronto)
Michael Gabler (MPA-Garching)
Stavros Katsanevas (EGO Director)
Kostas Kokkotas (Tuebingen)
Nikolaos Stergioulas (Thessaloniki)

The school will take place at the Aristotle University of Thessaloniki. Partial grants for local expenses to a limited number of participants are provided by the Hellenic Astronomical Society (HEL.A.S.). The school is supported by the Aristotle University of Thessaloniki, by the Department of Physics and by the Section of Astrophysics, Astronomy and Mechanics. The school is also supported by a DAAD grant for the academic collaboration between the relativity groups of the Aristotle University of Thessaloniki and the University of Tuebingen.

A number of rooms at selected hotels have been reserved at special prices. Please note that the block reservation will be valid until the registration deadline only, so it is advisable to make your reservation as soon as possible. After that, rooms and prices will depend on the availability of each hotel.

We are looking forward to meeting all interested participants in Thessaloniki in October!

With our best regards,

The Organizing Committee

K. Kokkotas
N. Stergioulas
P. Iosif
G. Tantilian
N. Tryfonidis
S. Vretinaris

Neutron stars in the dawn of multi-messenger astronomy, London, UK

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Neutron stars in the dawn of multi-messenger astronomy
(IoP Gravitational Physics Group September meeting)

This half-day meeting of the IOP Gravitational Physics Group is focused on recent developments in the study of neutron stars. The meeting will be comprised of three speakers:

– Prof. Nils Andersson (University of Southampton)
– Prof. Michael Kramer (University of Manchester / Max-Planck-Institut fuer Radioastronomie)
– Dr Samaya Nissanke (Radboud University)

All are welcome to attend and no registration fee will be charged. The talks will be preceded by the IOP Gravitational Physics Group annual general meeting.

Programme
11:00 – Annual General Meeting for members of the IOP Gravitational Physics Group
13:30 – Scientific Programme
17:00 – Close

Cost
All are welcome to attend and no registration fee will be charged.

Date
September 18, 2018

Time
11:00-17:00

Venue
Oxford Suite, Hallam Conference Centre, 44 Hallam street, London, W1W 6JJ

Contact
Events Officer: Dr Aindriú Conroy
a.conroy[AT]lancaster.ac.uk

Organised by:
The IOP Gravitational Physics Group

New Frontiers in Gravitational-Wave Astrophysics, Rome, Italy

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The exciting discovery of GW150914 has opened a new era for physics and astrophysics, which is rich of opportunities and challenges. New questions appear, and old questions are posed with renovated strength. This workshop brings together leading experts in gravitational-wave astrophysics, with the aim of discussing new frontiers in this exponentially-growing field, such as formation of black-hole binaries, multiwavelength and multimessenger astronomy, tests of gravity, neutron-star modelling, and equation-of-state extraction from gravitational-wave signals.

There will be few talks per day, three round tables, and plenty of time for discussions. The main themes to be discussed (one per day) are:

– GWs after the first detections
– GWs and neutron-star modelling
– Fundamental physics with GWs
– From ground to space

List of confirmed invited speakers and round-table organizers:

Stanislav Babak (AEI, Germany)
Enrico Barausse (IAP, France)
Andreas Bauswein (HITS, Germany)
Sebastiano Bernuzzi (Parma U., Italy)
Chris Berry (Birmingham U., UK)
Emanuele Berti (Mississippi U., USA)
Vitor Cardoso (IST, Portugal)
Massimo Dotti (Milan U., Italy)
Tania Hinderer (AEI, Germany)
Antoine Klein (IAP, France)
Kostas Kokkotas (Tubingen U., Germany)
Michela Mapelli (Padova U., Italy)
Rosalba Perna (Stony Brook, USA)
Raffaella Schneider (Sapienza U., Italy)
Alberto Sesana (Birmingham U., UK)
Thomas Sotiriou (Nottingham U., UK)
Leo Stein (Caltech, USA)
Alberto Vecchio (Birmingham, UK)
Kent Yagi (Princeton, USA)
Nico Yunes (Montana U., USA)

Since the number of participants is limited, we suggest to register at your earliest convenience.

Looking forward to seeing you in Rome,

Valeria Ferrari, Leonardo Gualtieri, Paolo Pani