Time domain phenomenological model of gravitational wave subdominant harmonics for quasi-circular non-precessing binary black hole coalescences

no code implementations • 22 Dec 2020 • Héctor Estellés, Sascha Husa, Marta Colleoni, David Keitel, Maite Mateu-Lucena, Cecilio García-Quirós, Antoni Ramos-Buades, Angela Borchers

In this work we present an extension of the time domain phenomenological model IMRPhenomT for gravitational wave signals from binary black hole coalescences to include subdominant harmonics, specifically the $(l=2, m=\pm 1)$, $(l=3, m=\pm 3)$, $(l=4, m=\pm 4)$ and $(l=5, m=\pm 5)$ spherical harmonics.

General Relativity and Quantum Cosmology

Setting the cornerstone for the IMRPhenomX family of models for gravitational waves from compact binaries: The dominant harmonic for non-precessing quasi-circular black holes

1 code implementation • 30 Jan 2020 • Geraint Pratten, Sascha Husa, Cecilio Garcia-Quiros, Marta Colleoni, Antoni Ramos-Buades, Hector Estelles, Rafel Jaume

In this paper we present IMRPhenomXAS, a thorough overhaul of the IMRPhenomD [1, 2] waveform model, which describes the dominant $l=2, \:| m | = 2$ spherical harmonic mode of non-precessing coalescing black holes in terms of piecewise closed form expressions in the frequency domain.

General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics

Predicting the properties of black holes merger remnants with Deep Neural Networks

no code implementations • 4 Nov 2019 • Leïla Haegel, Sascha Husa

In the precessing case, both remnant mass and spin mean square errors are decreased to one half, and the network corrects the bias observed in available fits.

Frequency-domain gravitational waves from non-precessing black-hole binaries. II. A phenomenological model for the advanced detector era

2 code implementations • 28 Aug 2015 • Sebastian Khan, Sascha Husa, Mark Hannam, Frank Ohme, Michael Pürrer, Xisco Jiménez Forteza, Alejandro Bohé

Beyond the calibration region the model produces physically reasonable results, although we recommend caution in assuming that \emph{any} merger-ringdown waveform model is accurate outside its calibration region.

General Relativity and Quantum Cosmology

Frequency-domain gravitational waves from non-precessing black-hole binaries. I. New numerical waveforms and anatomy of the signal

2 code implementations • 28 Aug 2015 • Sascha Husa, Sebastian Khan, Mark Hannam, Michael Pürrer, Frank Ohme, Xisco Jiménez Forteza, Alejandro Bohé

Equipped with our prediction for the final state we then develop a simple and accurate merger-ringdown-model based on modified Lorentzians in the gravitational wave amplitude and phase, and we discuss a simple method to represent the low frequency signal augmenting the TaylorF2 post-Newtonian approximant with terms corresponding to higher orders in the post-Newtonian expansion.

General Relativity and Quantum Cosmology

A simple model of complete precessing black-hole-binary gravitational waveforms

no code implementations • 14 Aug 2013 • Mark Hannam, Patricia Schmidt, Alejandro Bohé, Leila Haegel, Sascha Husa, Frank Ohme, Geraint Pratten, Michael Pürrer

The non-precessing-binary waveforms are then "twisted up" with approximate expressions for the precessional motion, which require only one additional physical parameter, an effective precession spin, $\chi_p$.

General Relativity and Quantum Cosmology