The open-access journal Living Reviews in Relativity has published two new review articles in June 2022:
Bogdanovic, T., Miller, M.C. and Blecha, L.
Electromagnetic counterparts to massive black-hole mergers.
Living Rev Relativ 25, 3 (2022).
https://doi.org/10.1007/s41114-022-00037-8
Summary: The aim of this review is to provide an introduction to this research topic by presenting a summary of key findings, physical processes and ideas pertaining to electromagnetic (EM) counterparts to massive black-hole (MBH) mergers as they are known at the time of this writing. We review current observational evidence for close MBH binaries, discuss relevant physical processes and timescales, and summarize the possible EM counterparts to gravitational waves in the precursor, coalescence, and afterglow stages of a MBH merger. We also describe open questions and discuss future prospects in this dynamic and quick-paced research area.
Arun, K.G., Belgacem, E., Benkel, R. et al.
New horizons for fundamental physics with LISA.
Living Rev Relativ 25, 4 (2022).
https://doi.org/10.1007/s41114-022-00036-9
Summary: The Laser Interferometer Space Antenna (LISA) has the potential to reveal wonders about the fundamental theory of nature at play in the extreme gravity regime, where the gravitational interaction is both strong and dynamical. In this white paper, the Fundamental Physics Working Group of the LISA Consortium summarizes the current topics in fundamental physics where LISA observations of gravitational waves can be expected to provide key input.
Note: This article is part of a new joint Topical Collection between Living Reviews and the journal General Relativity and Gravitation (https://link.springer.com/collections/bhdbjdhdhg).