Low-frequency gravitational-wave science with eLISA/NGO

Pau Amaro-Seoane , Sofiane Aoudia , Stanislav Babak , Pierre Bin\'etruy , Emanuele Berti , Alejandro Boh\'e , Chiara Caprini , Monica Colpi

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Neil J. Cornish Karsten Danzmann Jean-Fran\c{c}ois Dufaux Jonathan Gair Oliver Jennrich Philippe Jetzer Antoine Klein Ryan N. Lang Alberto Lobo Tyson Littenberg Sean T. McWilliams Gijs Nelemans Antoine Petiteau Edward K. Porter Bernard F. Schutz Alberto Sesana Robin Stebbins Tim Sumner Michele Vallisneri Stefano Vitale Marta Volonteri Henry Ward

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classification 🌀 gr-qc astro-ph.COastro-ph.GA

keywords elisagravitational-waveblackholesuniversewillearlygalaxy

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We review the expected science performance of the New Gravitational-Wave Observatory (NGO, a.k.a. eLISA), a mission under study by the European Space Agency for launch in the early 2020s. eLISA will survey the low-frequency gravitational-wave sky (from 0.1 mHz to 1 Hz), detecting and characterizing a broad variety of systems and events throughout the Universe, including the coalescences of massive black holes brought together by galaxy mergers; the inspirals of stellar-mass black holes and compact stars into central galactic black holes; several millions of ultracompact binaries, both detached and mass transferring, in the Galaxy; and possibly unforeseen sources such as the relic gravitational-wave radiation from the early Universe. eLISA's high signal-to-noise measurements will provide new insight into the structure and history of the Universe, and they will test general relativity in its strong-field dynamical regime.

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