On the gravitational wave background from compact binary coalescences in the band of ground-based interferometers
On the gravitational wave background from compact binary coalescences in the band of ground-based interferometers
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地基干涉仪波段致密双星聚结的引力波背景
DOI:
10.1093/mnras/stt207
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发表时间:
2012-09
影响因子:
4.8
通讯作者:
Zhu, Zong-Hong
中科院分区:
文献类型:
--
作者:
Zhu, Xing-Jiang;Howell, Eric J.;Blair, David G.;Zhu, Zong-Hong
This paper reports a comprehensive study on the gravitational wave (GW) background from compact binary coalescences. We consider in our calculations newly available observation-based neutron star and black hole mass distributions and complete analytical waveforms that include post-Newtonian amplitude corrections. Our results show that: (i) post-Newtonian effects cause a small reduction in the GW background signal; (ii) below 100 Hz the background depends primarily on the local coalescence rate $r_0$ and the average chirp mass and is independent of the chirp mass distribution; (iii) the effects of cosmic star formation rates and delay times between the formation and merger of binaries are linear below 100 Hz and can be represented by a single parameter within a factor of ~ 2; (iv) a simple power law model of the energy density parameter $\Omega_{GW}(f) ~ f^{2/3}$ up to 50-100 Hz is sufficient to be used as a search template for ground-based interferometers. In terms of the detection prospects of the background signal, we show that: (i) detection (a signal-to-noise ratio of 3) within one year of observation by the Advanced LIGO detectors (H1-L1) requires a coalescence rate of $r_0 = 3 (0.2) Mpc^{-3} Myr^{-1}$ for binary neutron stars (binary black holes); (ii) this limit on $r_0$ could be reduced 3-fold for two co-located detectors, whereas the currently proposed worldwide network of advanced instruments gives only ~ 30% improvement in detectability; (iii) the improved sensitivity of the planned Einstein Telescope allows not only confident detection of the background but also the high frequency components of the spectrum to be measured. Finally we show that sub-threshold binary neutron star merger events produce a strong foreground, which could be an issue for future terrestrial stochastic searches of primordial GWs.
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影响因子:
5
作者:
T. Regimbau;S. Hughes
通讯作者:
T. Regimbau;S. Hughes
DOI:
10.1111/j.1365-2966.2010.17585.x
发表时间:
2010-08
影响因子:
4.8
作者:
E. Howell;T. Regimbau;A. Corsi;D. Coward;R. Burman
通讯作者:
E. Howell;T. Regimbau;A. Corsi;D. Coward;R. Burman
影响因子:
40.6
作者:
Faber JA;Rasio FA
通讯作者:
Rasio FA
DOI:
10.1088/2041-8205/715/2/l138
发表时间:
2010-04
期刊:
The Astrophysical Journal Letters
影响因子:
--
作者:
K. Belczynski;M. Dominik;T. Bulik;R. O’Shaughnessy;Chris L. Fryer;D. Holz
通讯作者:
K. Belczynski;M. Dominik;T. Bulik;R. O’Shaughnessy;Chris L. Fryer;D. Holz
影响因子:
6
作者:
D. Coward;T. Regimbau
通讯作者:
D. Coward;T. Regimbau