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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

2 code implementations • 7 Aug 2018 • Davide Gerosa, Emanuele Berti, Richard O'Shaughnessy, Krzysztof Belczynski, Michael Kesden, Daniel Wysocki, Wojciech Gladysz

We study the expected spin misalignments of merging binary black holes (BHs) formed in isolation by combining state-of-the-art population synthesis models with efficient post-Newtonian evolutions, thus tracking sources from stellar formation to gravitational-wave detection.

High Energy Astrophysical Phenomena General Relativity and Quantum Cosmology

no code implementations • 5 May 2017 • Xinyu Zhao, Michael Kesden, Davide Gerosa

We use analytic solutions for generic spin precession at 2PN order to derive Fourier series for the total and orbital angular momenta in which each term is a sinusoid with frequency $\Omega - n\omega$ for integer $n$.

General Relativity and Quantum Cosmology High Energy Astrophysical Phenomena

1 code implementation • 3 May 2016 • Davide Gerosa, Michael Kesden

We present the numerical code PRECESSION: a new open-source python module to study the dynamics of precessing black-hole binaries in the post-Newtonian regime.

High Energy Astrophysical Phenomena Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies General Relativity and Quantum Cosmology

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

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