Document Type
Article
Publication Date
1-1-2016
Abstract
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-one body (EOB) model calibrated to numerical-relativity simulations, which forces spin alignment (nonprecessing EOBNR). Here, we present new results that include a 15-dimensional precessingspin 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 +5-3 M· and 30 +5-3 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.
Recommended Citation
Abbott, Benjamin P., Richard Abbott, Thomas D. Abbott, M. R. Abernathy, Fausto Acernese, K. Ackley, C. Adams et al. "Improved analysis of GW150914 using a fully spin-precessing waveform model." Physical Review X 6, no. 4 (2016): 041014. http://doi.org/10.1103/PhysRevX.6.041014
Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 License.
Publication Title
Physical Review X
DOI
10.1103/PhysRevX.6.041014
Comments
Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
Original version available at: http://doi.org/10.1103/PhysRevX.6.041014