论文标题
来自明亮二进制黑洞GW190521的哈勃参数的首次测量
First measurement of the Hubble parameter from bright binary black hole GW190521
论文作者
论文摘要
Zwicky瞬态设施（ZTF）报告了事件“ ZTF19ABANRHR”为候选电磁（EM），以红移$ z = 0.438 $，从二进制黑洞合并GW190521中的引力波（GW）发射。假设Ztf19abanrhr是{\ it tok fide} em对应物与GW190521，并且使用三种不同波形NRSUR7DQ4，SEOBNRV4PHM和IMRPHENOMPV3HM的GW亮度距离估计，我们报告了nrphenompv3hm，我们报告了usble $ $ $ h_0 = 50.4 _ { - 19.5}^{+28.1} $ km/s/mpc，$ 62.2 _ { - 19.7}^{+29.5} $ km/s/s/mpc，$ 43.1 _ { - 11.4}在物质密度上边缘化$ω_m$（或状态的暗能量方程$ W_0 $），假设Flat LCDM（或WCDM）模型。将我们的结果与二进制中子星事件GW170817与仅红移测量以及从非常大的基线干涉法（VLBI）推断出的倾斜角度相结合，我们发现$ H_0 = 67.6 _ { - 4.2} 0.47 _ { - 0.27}^{+0.34} $，以及$ W_0 = -1.17 _ { - 0.57}^{+0.68} $（中位数以及$ 68 \％$ $可信的间隔）提供了$ H_0 $ $ h_0 $ and priver nardard sir $和$ω_______________________________________的最严格的尺寸。将来，$ 1.3 \％$ $ $ h_0 = 68 $ km/s/mpc和$ 28 \％$ $ $ $ $ $ w_0 = -1 $可以从$ 200 $ gw190521类似的来源。
The Zwicky Transient Facility (ZTF) reported the event "ZTF19abanrhr" as a candidate electromagnetic (EM) counterpart at a redshift $z=0.438$ to the gravitational wave (GW) emission from the binary black hole merger GW190521. Assuming that ZTF19abanrhr is the {\it bona fide} EM counterpart to GW190521, and using the GW luminosity distance estimate from three different waveforms NRSur7dq4, SEOBNRv4PHM, and IMRPhenomPv3HM, we report a measurement of the Hubble constant $H_0= 50.4_{-19.5}^{+28.1}$ km/s/Mpc, $ 62.2_{-19.7}^{+29.5}$ km/s/Mpc, and $ 43.1_{-11.4}^{+24.6}$ km/s/Mpc (median along with $68\%$ credible interval) respectively after marginalizing over matter density $Ω_m$ (or dark energy equation of state $w_0$) assuming the flat LCDM (or wCDM) model. Combining our results with the binary neutron star event GW170817 with its redshift measurement alone, as well as with its inclination angle inferred from Very Large Baseline Interferometry (VLBI), we find $H_0= 67.6_{-4.2}^{+4.3}$ km/s/Mpc, $Ω_m= 0.47_{-0.27}^{+0.34}$, and $w_0= -1.17_{-0.57}^{+0.68}$ (median along with $68\%$ credible interval) providing the most stringent measurement on $H_0$ and the first estimation on $Ω_m$ and $w_0$ from bright standard siren. In the future, $1.3\%$ measurement of $H_0=68$ km/s/Mpc and $28\%$ measurement of $w_0=-1$ is possible from about $200$ GW190521-like sources.
