论文标题
使用Baryonic Tully-Fisher关系来测量$ H_O $
Using The Baryonic Tully-Fisher Relation to Measure $H_o$
论文作者
论文摘要
我们探讨了Baryonic Tully-Fisher关系(BTFR)作为新距离指示器的使用。近红外成像和恒星种群模型以及精确的旋转曲线的进展减少了BTFR的散射,因此距离是不确定性的主要来源。我们使用50个星系,距离头孢菌素的准确距离或红色巨型分支的尖端大小,我们将BTFR校准了BTFR,独立于$ H_O $。然后,我们使用CosmicFlows-3速度将此校准的BTFR应用于SPARC样品的95个独立星系,以推断出$ H_O $的局部值。我们发现$ h_o $ = 75.1 +/- 2.3(stat)+/- 1.5(sys)km s $^{ - 1} $ mpc $^{ - 1} $。
We explore the use of the baryonic Tully-Fisher relation (bTFR) as a new distance indicator. Advances in near-IR imaging and stellar population models, plus precise rotation curves, have reduced the scatter in the bTFR such that distance is the dominant source of uncertainty. Using 50 galaxies with accurate distances from Cepheids or tip magnitude of the red giant branch, we calibrate the bTFR on a scale independent of $H_o$. We then apply this calibrated bTFR to 95 independent galaxies from the SPARC sample, using CosmicFlows-3 velocities, to deduce the local value of $H_o$. We find $H_o$ = 75.1 +/- 2.3 (stat) +/- 1.5 (sys) km s$^{-1}$ Mpc$^{-1}$.