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arXiv 2007.04313gr-qc
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测量引力波高阶模

Measuring gravitational-wave higher-order modes

Cameron Mills, Stephen Fairhurst

摘要:

研究了双黑洞并合过程中发射的引力波信号中高次谐波的可观测性。我们将每个模式分解成一个整体的振幅,依赖于系统的质量和自旋,以及一个依赖于方向的项,依赖于源的倾斜和极化。使用这种分解,我们调查的参数空间上的更高的模式的意义,并表明,$\ell = 3$,$m = 3$模式是最显着的地面干涉探测器的敏感带的大部分,与$\ell = 4$,$m = 4$具有显着的贡献,在高质量。我们介绍了更高的模式的信噪比(SNR),并表明,一个简单的阈值,这个SNR可以作为一个标准,观察高次谐波。最后,我们调查的二进制人口的可观测性,并观察到,高次谐波将仅在百分之几的二进制,通常是那些不平等的质量和观察接近边缘。

英文摘要:

We investigate the observability of higher harmonics in gravitational wave signals emitted during the coalescence of binary black holes. We decompose each mode into an overall amplitude, dependent upon the masses and spins of the system, and an orientation-dependent term, dependent upon the inclination and polarization of the source. Using this decomposition, we investigate the significance of higher modes over the parameter space and show that the $\ell = 3$, $m = 3$ mode is most significant across much of the sensitive band of ground-based interferometric detectors, with the $\ell = 4$, $m = 4$ having a significant contribution at high masses. We introduce the higher mode signal-to-noise ratio (SNR), and show that a simple threshold on this SNR can be used as a criterion for observation of higher harmonics. Finally, we investigate observability in a population of binaries and observe that higher harmonics will only be observable in a few percent of binaries, typically those with unequal masses and viewed close to edge-on.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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