Simulations of inspiraling and merging double neutron stars using the Spectral Einstein Code
Simulations of inspiraling and merging double neutron stars using the Spectral Einstein Code
复制标题
使用光谱爱因斯坦代码模拟双中子星的吸入和合并
DOI:
--
复制
发表时间:
2016
期刊:
影响因子:
--
通讯作者:
S. Teukolsky
中科院分区:
文献类型:
--
作者:
R. Haas;C. Ott;B. Szilágyi;J. Kaplan;J. Lippuner;M. Scheel;K. Barkett;Curran D. Muhlberger;T. Dietrich;Matthew D. Duez;F. Foucart;H. Pfeiffer;Lawrence E. Kidder;S. Teukolsky
We present results on the inspiral, merger, and postmerger evolution of a neutron star-neutron star (NSNS) system. Our results are obtained using the hybrid pseudospectral-finite volume Spectral Einstein Code (SpEC). To test our numerical methods, we evolve an equal-mass system for ≈22 orbits before merger. This waveform is the longest waveform obtained from fully general-relativistic simulations for NSNSs to date. Such long (and accurate) numerical waveforms are required to further improve semianalytical models used in gravitational wave data analysis, for example, the effective one body models. We discuss in detail the improvements to SpEC’s ability to simulate NSNS mergers, in particular mesh refined grids to better resolve the merger and postmerger phases. We provide a set of consistency checks and compare our results to NSNS merger simulations with the independent bam code. We find agreement between them, which increases confidence in results obtained with either code. This work paves the way for future studies using long waveforms and more complex microphysical descriptions of neutron star matter in SpEC.
影响因子:
5
作者:
T. Dietrich;N. Moldenhauer;N. K. Johnson-McDaniel;S. Bernuzzi;C. M. Markakis;B. Brügmann;W. Tichy
通讯作者:
W. Tichy
影响因子:
5
作者:
B. Bruegmann;José A. González;M. Hannam;S. Husa;U. Sperhake;W. Tichy
通讯作者:
B. Bruegmann;José A. González;M. Hannam;S. Husa;U. Sperhake;W. Tichy
影响因子:
4.9
作者:
Dominik, Michal;Berti, Emanuele;Pannarale, Francesco
通讯作者:
Pannarale, Francesco