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arXiv 2203.03643astro-ph.COastro-ph.HEgr-qc
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交叉关联暗 sirens 与星系:来自 LIGO-Virgo-KAGRA GWTC-3 的 $H_0$ 约束

Cross-correlating dark sirens and galaxies: constraints on $H_0$ from GWTC-3 of LIGO-Virgo-KAGRA

Suvodip Mukherjee, Alex Krolewski, Benjamin D. Wandelt, Joseph Silk

AI总结:

该研究通过交叉关联暗 sirens 与星系巡天数据并结合亮 sirens 事件,测得哈勃常数 $H_0=75.4_{-6}^{+11}$ km/s/Mpc,但暗 sirens 约束统计不显著,未来更多事件将改进约束。

摘要:

我们应用交叉关联技术,利用第三次引力波瞬变目录(GWTC-3)中无电磁对应体的引力波源(暗 sirens)以及光度星系巡天 2MPZ 和 WISE-SuperCOSMOS 来推断宇宙的哈勃常数($H_0$),并将这些与来自 GW170817 的亮 sirens 测量 $H_0$ 相结合。仅使用暗 sirens 时,由于定位良好的引力波源数量较少,$H_0$ 的后验分布不具信息量。利用八个定位良好的暗 sirens 和带有电磁对应体的双中子星 GW170817,在边缘化物质密度和引力波偏差参数后,我们得到哈勃常数 $H_0= 75.4_{-6}^{+11}$ km/s/Mpc(中位数和 68.3% 等尾区间(ETI))。该测量主要由亮 sirens 测量驱动,暗 sirens 的任何约束在统计上不显著。未来,随着更多定位良好的引力波事件,对膨胀历史的约束将得到改善。

英文摘要:

We apply the cross-correlation technique to infer the Hubble constant ($H_0$) of the Universe using gravitational wave (GW) sources without electromagnetic counterparts (dark sirens) from the third GW Transient Catalog (GWTC-3) and the photometric galaxy surveys 2MPZ and WISE-SuperCOSMOS, and combine these with the bright siren measurement of $H_0$ from GW170817. The posterior on $H_0$ with only dark sirens is uninformative due to the small number of well-localised GW sources. Using the eight well-localized dark sirens and the binary neutron star GW170817 with EM counterpart, we obtain a value of the Hubble constant $H_0= 75.4_{-6}^{+11}$ km/s/Mpc (median and 68.3$\%$ equal-tailed interval (ETI)) after marginalizing over the matter density and the GW bias parameters. This measurement is mostly driven by the bright siren measurement and any constraint from dark sirens is not statistically significant. In the future, with more well-localized GW events, the constraints on expansion history will improve.

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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