Computation of displacement and spin gravitational memory in numerical relativity
Computation of displacement and spin gravitational memory in numerical relativity
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数值相对论中位移和自旋引力记忆的计算
DOI:
10.1103/physrevd.102.104007
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发表时间:
2020
影响因子:
5
通讯作者:
Throwe, William
中科院分区:
文献类型:
--
作者:
Mitman, Keefe;Moxon, Jordan;Scheel, Mark A.;Teukolsky, Saul A.;Boyle, Michael;Deppe, Nils;Kidder, Lawrence E.;Throwe, William
We present the first numerical relativity waveforms for binary black hole mergers produced using spectral methods that show both the displacement and the spin memory effects. Explicitly, we use the SXS (Simulating eXtreme Spacetimes) Collaboration’sspeccode to run a Cauchy evolution of a binary black hole merger and then extract the gravitational wave strain usingspectre’s version of a Cauchy-characteristic extraction. We find that we can accurately resolve the strain’s traditionalmemory modes and some of theoscillatory memory modes that have previously only been theorized. We also perform a separate calculation of the memory using equations for the Bondi-Metzner-Sachs charges as well as the energy and angular momentum fluxes at asymptotic infinity. Our new calculation uses only the gravitational wave strain and two of the Weyl scalars at infinity. Also, this computation shows that the memory modes can be understood as a combination of a memory signal throughout the binary’s inspiral and merger phases, and a quasinormal mode signal near the ringdown phase. Additionally, we find that the magnetic memory, up to numerical error, is indeed zero as previously conjectured. Last, we find that signal-to-noise ratios of memory for LIGO, the Einstein Telescope, and the Laser Interferometer Space Antenna with these new waveforms and new memory calculation are larger than previous expectations based on post-Newtonian or minimal waveform models.
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影响因子:
8.6
作者:
P. Lasky;E. Thrane;Y. Levin;J. Blackman;Yanbei Chen
通讯作者:
P. Lasky;E. Thrane;Y. Levin;J. Blackman;Yanbei Chen
影响因子:
40.6
作者:
N. Bishop;L. Rezzolla
通讯作者:
L. Rezzolla
DOI:
10.21105/joss.01683
发表时间:
2019
期刊:
J. Open Source Softw.
影响因子:
--
作者:
L. Stein
通讯作者:
L. Stein
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
N. Bishop;C. Reisswig
通讯作者:
C. Reisswig
影响因子:
5
作者:
Baibhav, Vishal;Berti, Emanuele;Khanna, Gaurav
通讯作者:
Khanna, Gaurav