no code implementations • 28 Jul 2020 • Roxana Rosca-Mead, Christopher J. Moore, Ulrich Sperhake, Michalis Agathos, Davide Gerosa
We compute families of spherically symmetric neutron-star models in two-derivative scalar-tensor theories of gravity with a massive scalar field.
General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena
no code implementations • 14 Nov 2018 • Davide Gerosa, Alicia Lima, Emanuele Berti, Ulrich Sperhake, Michael Kesden, Richard O'Shaughnessy
Within the framework of 2PN black-hole binary spin precession, we explore configurations where one of the two spins oscillates from being completely aligned with the orbital angular momentum to being completely anti-aligned with it during a single precession cycle.
General Relativity and Quantum Cosmology Astrophysics of Galaxies High Energy Astrophysical Phenomena
no code implementations • 15 Dec 2016 • Davide Gerosa, Ulrich Sperhake, Jakub Vošmera
We analyze the inspiral dynamics of equal-mass precessing black-hole binaries using multi-timescale techniques.
General Relativity and Quantum Cosmology Astrophysics of Galaxies High Energy Astrophysical Phenomena
no code implementations • 20 Jul 2015 • Daniele Trifirò, Richard O'Shaughnessy, Davide Gerosa, Emanuele Berti, Michael Kesden, Tyson Littenberg, Ulrich Sperhake
Gravitational waves from coalescing binary black holes encode the evolution of their spins prior to merger.
General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena
no code implementations • 30 Jun 2015 • Davide Gerosa, Michael Kesden, Richard O'Shaughnessy, Antoine Klein, Emanuele Berti, Ulrich Sperhake, Daniele Trifirò
In this work, we show that these solutions can be unstable when the spin of the higher-mass black hole is aligned with the orbital angular momentum and the spin of the lower-mass black hole is anti-aligned.
General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena
no code implementations • 10 Jun 2015 • Davide Gerosa, Michael Kesden, Ulrich Sperhake, Emanuele Berti, Richard O'Shaughnessy
The dynamics of precessing binary black holes (BBHs) in the post-Newtonian regime has a strong timescale hierarchy: the orbital timescale is very short compared to the spin-precession timescale which, in turn, is much shorter than the radiation-reaction timescale on which the orbit is shrinking due to gravitational-wave emission.
General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies High Energy Astrophysical Phenomena
no code implementations • 3 Nov 2014 • Michael Kesden, Davide Gerosa, Richard O'Shaughnessy, Emanuele Berti, Ulrich Sperhake
We derive an effective potential for binary black-hole (BBH) spin precession at second post-Newtonian order.
General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena
no code implementations • 18 Feb 2013 • Davide Gerosa, Michael Kesden, Emanuele Berti, Richard O'Shaughnessy, Ulrich Sperhake
Under the plausible assumption that tidal interactions are efficient at aligning the spins of few-solar mass black-hole progenitors with the orbital angular momentum, we find that black-hole spins should be expected to preferentially lie in a plane when they become detectable by gravitational-wave interferometers.
General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena
