CE31 - Physique subatomique et astrophysique

Massive black hole mergers: light and gravitational waves – MBH_Waves

Submission summary

Gravitational waves from massive black holes (MBHs), 1e4-1e9 solar masses, are a new frontier that Pulsar Timing Arrays and LISA are opening to us: the first hint of the stochastic background from MBH binaries has been revealed this year by NANOGrav. MBH binaries can also be detected electromagnetically, and the Legacy Survey of Space and Time, starting in 2021, will search for such signals. Our project will interpret these observations and make predictions for LISA. We will use cosmological simulations with novel physics for the dynamics of MBH binaries and their electromagnetic emission before, during and after the merger. We will perform a full gravitational wave data analysis with experiment-specific tools. This program will (i) show how joint gravitational waves and electromagnetic radiation strategies can improve our knowledge of the coevolution of galaxies and MBHs over cosmic time. (ii) Test how well standard sirens can probe the background acceleration of the Universe

Project coordination

Marta Volonteri (Institut d'astrophysique de Paris)

The author of this summary is the project coordinator, who is responsible for the content of this summary. The ANR declines any responsibility as for its contents.

Partner

IAP Institut d'astrophysique de Paris
GEPI Galaxies, Etoiles, Physique, Instrumentation
APC Astroparticule et Cosmologie
IRAP Institut de recherche en astrophysique et planétologie

Help of the ANR 567,319 euros
Beginning and duration of the scientific project: - 48 Months

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