Parameter estimation for compact binary coalescence signals with the first generation gravitational-wave detector network
Parameter estimation for compact binary coalescence signals with the first generation gravitational-wave detector network
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DOI：
10.1103/physrevd.88.062001
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发表时间：
2013-09-04
影响因子：
5
通讯作者：
Zweizig, J.
中科院分区：
文献类型：
--
作者：
Aasi, J.;Abadie, J.;Zweizig, J.
具有中子星或黑洞的致密双星系统是地面引力波探测器最有前途的来源之一。引力辐射编码了丰富的源物理信息，因此参数估计和模型选择是任何探测候选事件的关键分析步骤。预期波形的详细模型可以推断几个参数，如组件质量、自转、天空位置和距离，这些参数对于对这些源进行新的天体物理研究至关重要。然而，这些参数的准确测量和描述潜在物理的模型的识别由于数据中的伪影、波形模型中的不确定性和探测器的校准而变得复杂。在这里，我们报告了在两台LIGO仪器和处女座探测器最近一次联合科学运行期间，将硬件或软件添加到收集的数据中的一组模拟信号的测量结果，包括最初没有向合作伙伴透露信号的“盲注”。我们举例说明了在1m(圆点)-25m(圆点)的分量质量范围内覆盖中子星和黑洞二进制参数空间的信号以及整个自旋参数范围内提取源物理信息的能力。本研究报告的案例提供了参数估计状态的快照，为先进探测器的运行做准备。
Compact binary systems with neutron stars or black holes are one of the most promising sources for ground-based gravitational-wave detectors. Gravitational radiation encodes rich information about source physics; thus parameter estimation and model selection are crucial analysis steps for any detection candidate events. Detailed models of the anticipated waveforms enable inference on several parameters, such as component masses, spins, sky location and distance, that are essential for new astrophysical studies of these sources. However, accurate measurements of these parameters and discrimination of models describing the underlying physics are complicated by artifacts in the data, uncertainties in the waveform models and in the calibration of the detectors. Here we report such measurements on a selection of simulated signals added either in hardware or software to the data collected by the two LIGO instruments and the Virgo detector during their most recent joint science run, including a "blind injection'' where the signal was not initially revealed to the collaboration. We exemplify the ability to extract information about the source physics on signals that cover the neutron-star and black-hole binary parameter space over the component mass range 1M(circle dot)-25M(circle dot) and the full range of spin parameters. The cases reported in this study provide a snapshot of the status of parameter estimation in preparation for the operation of advanced detectors.