arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2105.04422gr-qcastro-ph.HE
收藏

具有引力波的中等质量比黑洞合并的高精度源表征:高阶多极的重要性

High-precision source characterization of intermediate mass-ratio black hole coalescences with gravitational waves: The importance of higher-order multipoles

Tousif Islam, Scott E. Field, Carl-Johan Haster, Rory Smith

摘要:

中等质量比螺旋(IMRI)双星-包含恒星质量黑洞合并成中等质量黑洞($M>100M_{\odot}$)-是高级LIGO/Virgo备受期待的引力波(GW)源。对它们的探测和源的定性将为强场引力和恒星演化提供独特的探测。由于不对称的组件质量和大的初级,这些系统一般激发次主导模式,同时降低主导四极模的重要性。包括更高阶谐波还可以导致IMRI的信噪比的$10\%-25\%$增加,这可以有助于检测这些系统。我们表明,通过包括次主导GW模式的分析,我们可以实现精确的表征IMRI源属性。例如,我们发现,IMRI的源特性可以测量到$2\%-15\%$精度内基准信噪比为25,如果包括次主导模式。当忽略次主模时,精度降低到$9\%-44\%$,并且在啁啾质量、质量比、主自旋和光度距离中观察到显著的偏差。我们进一步证明,包括次主导模式的波形模型可以使两个单独的自旋分量的信息测量和改善源定位的一个因素的$\sim$ 10。我们讨论了次主导模式实现的高精度源表征的一些重要天体物理意义,例如限制质量间隙和探测形成通道。

英文摘要:

Intermediate mass ratio inspiral (IMRI) binaries -- containing stellar-mass black holes coalescing into intermediate-mass black holes ($M>100M_{\odot}$) -- are a highly anticipated source of gravitational waves (GWs) for Advanced LIGO/Virgo. Their detection and source characterization would provide a unique probe of strong-field gravity and stellar evolution. Due to the asymmetric component masses and the large primary, these systems generically excite subdominant modes while reducing the importance of the dominant quadrupole mode. Including higher order harmonics can also result in a $10\%-25\%$ increase in signal-to-noise ratio for IMRIs, which may help to detect these systems. We show that by including subdominant GW modes into the analysis we can achieve a precise characterization of IMRI source properties. For example, we find that the source properties for IMRIs can be measured to within $2\%-15\%$ accuracy at a fiducial signal-to-noise ratio of 25 if subdominant modes are included. When subdominant modes are neglected, the accuracy degrades to $9\%-44\%$ and significant biases are seen in chirp mass, mass ratio, primary spin and luminosity distances. We further demonstrate that including subdominant modes in the waveform model can enable an informative measurement of both individual spin components and improve the source localization by a factor of $\sim$10. We discuss some important astrophysical implications of high-precision source characterization enabled by subdominant modes such as constraining the mass gap and probing formation channels.

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。

↑