论文标题
首次重力波搜索与高阶谐波中间质量黑洞合并合并
First gravitational-wave search for intermediate-mass black hole mergers with higher order harmonics
论文作者
论文摘要
当前匹配的过滤器搜索来自二进制黑洞合并的重力波，将校准的检测器数据与波形模板进行了比较，这些模板省略了通过一般相对性预测的信号的高阶模式内容。但是，高阶发射模式对于高于$ \ simeq 100 m_ \ odot $的高度倾斜的不对称来源变得很重要，从而导致当前搜索在检测它们时不适合使用。我们提出了一项新的重力波搜索，该搜索实现了模板，包括高阶模式，适应性的信号 - 旋转歧视器和触发式升级统计量，以特异性地靶向显示较高模式的信号，对应于几乎有边缘的源，这些源在中间的黑孔范围（1+z）$ y y y $ y+z）$ and $ y和100,500）（100,500）（100,,500）in（100,,500） $ q \ in（1,10）$。我们的搜索显示，与省略高阶模式相比，这些信号的体积灵敏度增益最高为$ 450 \％$。我们从高级LIGO的第三次观察运行中部署了公共数据的搜索。尽管我们发现除了在其他地方报道的候选人之外没有统计学上重要的候选人，但我们的搜索设定了阶段，以在未来的观察过程中搜索较高模式的信号。对此类信号的有效检测对于进行一般相对性，观察强场现象的详细测试以及最大程度地观察中间质量黑洞二进制领域的机会至关重要。
Current matched-filter searches for gravitational waves from binary black-hole mergers compare the calibrated detector data to waveform templates that omit the higher-order mode content of the signals predicted by General Relativity. However, higher-order emission modes become important for highly inclined asymmetric sources with masses above $\simeq 100 M_\odot$, causing current searches to be ill-suited at detecting them. We present a new gravitational-wave search that implements templates including higher-order modes, adapted signal-glitch discriminators, and trigger-ranking statistics to specifically target signals displaying strong higher modes, corresponding to nearly edge-on sources with total redshifted masses in the intermediate-mass black-hole range $M_T(1+z) \in (100,500) M_\odot$ and mass-ratios $q\in(1,10)$. Our search shows a volumetric sensitivity gain of up to $450\%$ to these signals compared to existing searches omitting higher-order modes. We deploy our search on public data from the third observing run of Advanced LIGO. While we find no statistically significant candidates beyond those already reported elsewhere, our search sets the stage to search for higher-mode rich signals in future observing runs. The efficient detection of such signals is crucial to performing detailed tests of General Relativity, observing strong-field phenomena, and maximizing the chances of observing the yet uncharted realm of intermediate-mass black hole binaries.
