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150198 - Improved Analysis of GW150914 Using a Fully Spin-Precessing Waveform Model.pdf (1.28 MB)

Improved analysis of GW150914 using a fully spin-precessing waveform model

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posted on 2023-05-21, 07:54 authored by Abbott, BP, Abbott, R, Karelle SiellezKarelle Siellez, Zlochower, Y

This paper presents updated estimates of source parameters for GW150914, a binary black-hole coalescence event detected by the Laser Interferometer Gravitational-wave Observatory (LIGO) in 2015 [Abbott et al. Phys. Rev. Lett. 116, 061102 (2016).]. Abbott et al. [Phys. Rev. Lett. 116, 241102 (2016).] presented parameter estimation of the source using a 13-dimensional, phenomenological precessing-spin model (precessing IMRPhenom) and an 11-dimensional nonprecessing effective-onebody (EOB) model calibrated to numerical-relativity simulations, which forces spin alignment (nonprecessing EOBNR). Here, we present new results that include a 15-dimensional precessing-spin waveform model (precessing EOBNR) developed within the EOB formalism. We find good agreement with the parameters estimated previously [Abbott et al. Phys. Rev. Lett. 116, 241102 (2016).], and we quote updated component masses of 35+5−3M and 30+3−4 M (where errors correspond to 90% symmetric credible intervals). We also present slightly tighter constraints on the dimensionless spin magnitudes of the two black holes, with a primary spin estimate < 0.65 and a secondary spin estimate < 0.75 at 90% probability. Abbott et al. [Phys. Rev. Lett. 116, 241102 (2016).] estimated the systematic parameter-extraction errors due to waveform-model uncertainty by combining the posterior probability densities of precessing IMRPhenom and nonprecessing EOBNR. Here, we find that the two precessing-spin models are in closer agreement, suggesting that these systematic errors are smaller than previously quoted.

History

Publication title

Physical Review X

Volume

6

Issue

4

Pagination

041014

ISSN

2160-3308

Department/School

School of Natural Sciences

Publisher

American Physical Society

Place of publication

United States

Rights statement

© 2016 American Physical Society. All rights reserved. Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 Unported (CC BY 3.0) license. (https://creativecommons.org/licenses/by/3.0/)

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  • Open

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Expanding knowledge in the physical sciences

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