Detecting short-term gravitational waves from post-merger hyper-massive neutron stars with a kilohertz detector  

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作  者:陈奕康 朱宗宏 Yikang Chen;Zong-Hong Zhu(Institute for Frontier in Astronomy and Astrophysics,Beijing Normal University,Beijing 102206,China;Department of Astronomy,Beijing Normal University,Beijing 100875,China)

机构地区:[1]Institute for Frontier in Astronomy and Astrophysics,Beijing Normal University,Beijing 102206,China [2]Department of Astronomy,Beijing Normal University,Beijing 100875,China

出  处:《Chinese Physics B》2024年第8期222-228,共7页中国物理B(英文版)

基  金:supported by the National Natural Science Foundation of China (Grant Nos.12021003,11920101003,and 11633001);the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No.XDB23000000)。

摘  要:Gravitational waves emanating from binary neutron star inspirals,alongside electromagnetic transients resulting from the aftermath of the GW170817 merger,have been successfully detected.However,the intricate post-merger dynamics that bridge these two sets of observables remain enigmatic.This includes if,and when,the post-merger remnant star collapses to a black hole,and what are the necessary conditions to power a short gamma-ray burst,and other observed electromagnetic counterparts.Our focus is on the detection of gravitational wave(GW)emissions from hyper-massive neutron stars(NSs)formed through binary neutron star(BNS)mergers.Utilizing several kilohertz GW detectors,we simulate BNS mergers within the detection limits of LIGO-Virgo-KARGA O4.Our objective is to ascertain the fraction of simulated sources that may emit detectable post-merger GW signals.For kilohertz detectors equipped with a new cavity design,we estimate that approximately 1.1%-32%of sources would emit a detectable post-merger GW signal.This fraction is contingent on the mass converted into gravitational wave energy,ranging from 0.01M_(sun)to 0.1M_(sun).Furthermore,by evaluating other well-regarded proposed kilohertz GW detectors,we anticipate that the fraction can increase to as much as 2.1%-61%under optimal performance conditions.

关 键 词:neutron star mergers gravitational waves 

分 类 号:P145.6[天文地球—天体物理]

 

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