论文标题
Ligo/处女座重力紧凑对象合并GW190814和暗能量调查星系的统计标准警报器测量。
A statistical standard siren measurement of the Hubble constant from the LIGO/Virgo gravitational wave compact object merger GW190814 and Dark Energy Survey galaxies
论文作者
论文摘要
我们使用重力波（GW）事件GW190814进行了对哈勃常数$ h_0 $的测量，这是由23 $ m_ \ odot $ black hole的结合产生的，该孔具有2.6 $ m_ \ odot $ compact $ compact对象。对于此事件，尚未确定引人注目的电磁对应物，因此我们的分析占了统计框架内数千个潜在的宿主星系。红移信息是从黑暗能源调查中的光度红移（Photo- $ Z $）目录中获得的。 Ligo/处女座重力波空图提供了光度距离。由于此GW事件的定位量仅次于GW170817，因此GW190814可能会从单个标准警报器中提供对宇宙学的最佳约束，而无需识别电磁对应物。我们的分析使用照片 - $ z $概率分布功能和校正照片 - $ z $偏见。我们还将在此更新的框架内重新分析了二进制黑色孔GW170814。我们探讨了我们的发现如何影响GW170817的$ H_0 $约束，这是与独特的主机银河系相关联的GW合并。从GW190814，GW170814和GW170817的组合中，我们的分析得出$ H_0 = 72.0^{+ 12} _ { - 8.2}〜{\ rm km〜s km〜s^s^{ - 1} $ [20,140]〜{\ rm km〜s^{ - 1} 〜mpc^{ - 1}} $之间的均匀。将GW190814和GW170814添加到GW170817中可以将68 \％HDI从GW170817中提高到$ \ sim 18 \％$，从而表明没有同步物可以为标准的Siren测度量提供了重要的贡献，只要在Galaxy Catal and Ancal and Ancal and Ancal and Ancation Ancy Anc Ang Anc Ang Ancy Anc Anc Anc And Ance and and parts and parts and part \％$ $ \％$ $ \％$ $ \％$。
We present a measurement of the Hubble constant $H_0$ using the gravitational wave (GW) event GW190814, which resulted from the coalescence of a 23 $M_\odot$ black hole with a 2.6 $M_\odot$ compact object, as a standard siren. No compelling electromagnetic counterpart has been identified for this event, thus our analysis accounts for thousands of potential host galaxies within a statistical framework. The redshift information is obtained from the photometric redshift (photo-$z$) catalog from the Dark Energy Survey. The luminosity distance is provided by the LIGO/Virgo gravitational wave sky map. Since this GW event has the second-smallest localization volume after GW170817, GW190814 is likely to provide the best constraint on cosmology from a single standard siren without identifying an electromagnetic counterpart. Our analysis uses photo-$z$ probability distribution functions and corrects for photo-$z$ biases. We also reanalyze the binary-black hole GW170814 within this updated framework. We explore how our findings impact the $H_0$ constraints from GW170817, the only GW merger associated with a unique host galaxy. From a combination of GW190814, GW170814 and GW170817, our analysis yields $H_0 = 72.0^{+ 12}_{- 8.2 }~{\rm km~s^{-1}~Mpc^{-1}}$ (68\% Highest Density Interval, HDI) for a prior in $H_0$ uniform between $[20,140]~{\rm km~s^{-1}~Mpc^{-1}}$. The addition of GW190814 and GW170814 to GW170817 improves the 68\% HDI from GW170817 alone by $\sim 18\%$, showing how well-localized mergers without counterparts can provide a significant contribution to standard siren measurements, provided that a complete galaxy catalog is available at the location of the event.
