Eccentric binary neutron star search prospects for Cosmic Explorer
Eccentric binary neutron star search prospects for Cosmic Explorer
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DOI：
10.1103/physrevd.104.063011
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发表时间：
2021-03
影响因子：
5
通讯作者：
A. Lenon;Duncan A. Brown;A. Nitz
中科院分区：
文献类型：
--
作者：
A. Lenon;Duncan A. Brown;A. Nitz
我们确定的能力，宇宙探测器，拟议的第三代引力波天文台，检测偏心双星中子星，并测量其偏心率。我们发现，对于匹配滤波器搜索，使用准圆轨道上的双星构造的模板库对于CE1（CE2）的e7 ≤ 0.004（e7 ≤ 0.003）的偏心中子星星双星是有效的，其中e7是双星在7 Hz的引力波频率处的偏心率。我们表明，随机模板放置可以用来构建一个匹配过滤器搜索的二进制与较大的偏心率和构建一个有效的模板库的二进制与e7 ≤ 0.05。我们表明，在准圆轨道和偏心轨道的二进制搜索的计算成本是不是显着大于宇宙探测器比先进的LIGO，是与当今的计算资源。我们调查宇宙探险家的能力，以区分圆形和偏心双星。我们估计，对于信噪比为20（800）的双星，宇宙探测器可以在90%的置信度下区分圆形双星和偏心率为e7 & 10−2（10−3）的双星。
We determine the ability of Cosmic Explorer, a proposed third-generation gravitational-wave observatory, to detect eccentric binary neutron stars and to measure their eccentricity. We find that for a matched-filter search, template banks constructed using binaries in quasi-circular orbits are effectual for eccentric neutron star binaries with e7 ≤ 0.004 (e7 ≤ 0.003) for CE1 (CE2), where e7 is the binary’s eccentricity at a gravitational-wave frequency of 7 Hz. We show that stochastic template placement can be used to construct a matched-filter search for binaries with larger eccentricities and construct an effectual template bank for binaries with e7 ≤ 0.05. We show that the computational cost of both the search for binaries in quasi-circular orbits and eccentric orbits is not significantly larger for Cosmic Explorer than for Advanced LIGO and is accessible with present-day computational resources. We investigate Cosmic Explorer’s ability to distinguish between circular and eccentric binaries. We estimate that for a binary with a signal-to-noise ratio of 20 (800), Cosmic Explorer can distinguish between a circular binary and a binary with eccentricity e7 & 10−2 (10−3) at 90% confidence.