论文标题
使用表面亮度波动校准的IA型超新星对哈勃常数的新测量
A new measurement of the Hubble constant using Type Ia supernovae calibrated with surface brightness fluctuations
论文作者
论文摘要
我们根据表面亮度波动(SBF)方法提出了SNE型IA型峰值绝对幅度的新校准,旨在测量哈勃常数的值。我们构建了一个校准锚的样本,该锚定锚定在具有SBF距离测量值的星系中托管的24个SNE。采用分层贝叶斯方法,我们通过在红移范围内使用96 sne ia的样本$ 0.02 <z <z <0.075 $校准SNE亮度,并将其扩展到哈勃流中,该样品从合并的Pantheon样品中提取。我们估计值为$ h_0 = 70.50 \ pm 2.37(stat)\ pm 3.38(sys)$ $ \ text {km} \ \ text {s}^{ - 1} \ \ \ \ text {mpc} {mpc}^{-1}^{ - 1} $(i.e. 3.4 \%cysems in IS in 4.8 \%cysem)红色的巨型分支校准,并在误差中与从SNE类型IA获得的值一致,并从cepheids校准的IA和从宇宙微波背景的分析中推断出的值。我们发现,用SBF校准的SNE IA距离模量平均比用头孢虫校准的SNE距离大0.07 mag。我们的结果表明,在不同类型的星系中,SNE之间可能存在差异,这可能起源于不同的本地环境和/或SNE IA祖细胞性质。 SBF采样不同的主机星系类型,为头孢虫提供了一种补充方法,这对于解决可能的系统很重要。由于SBF方法具有比头孢虫更大的能力达到更大的距离,因此LSST和JWST的即将进入的进入将增加可以测量SBF距离的星系中托管的SNE IA的数量,从而使SBF测量值有吸引力,使SBF测量值有吸引力,可以提高SNE IA的校准,并估计$ H__0 $ $。
We present a new calibration of the peak absolute magnitude of SNe Type Ia based on the Surface Brightness Fluctuations (SBF) method, aimed at measuring the value of the Hubble constant. We build a sample of calibrating anchors consisting of 24 SNe hosted in galaxies having SBF distance measurements. Applying a hierarchical Bayesian approach, we calibrate the SNe luminosity and extend it into the Hubble flow by using a sample of 96 SNe Ia in the redshift range $0.02 < z < 0.075$, extracted from the Combined Pantheon Sample. We estimate a value of $H_0 = 70.50 \pm 2.37(stat) \pm 3.38(sys)$ $\text{km}\ \text{s}^{-1}\ \text{Mpc}^{-1}$ (i.e. $3.4\% stat, 4.8\% sys$), which is in agreement with the value obtained using the tip of the red giant branch calibration, and consistent within the errors with the value obtained from SNe Type Ia calibrated with Cepheids and the one inferred from the analysis of the cosmic microwave background. We find that the SNe Ia distance moduli calibrated with SBF are on average larger by 0.07 mag than the ones calibrated with Cepheids. Our results point to possible differences among SNe in different types of galaxies, which could originate from different local environments and/or SNe Ia progenitor properties. Sampling different host galaxy type, SBF offers a complementary approach to Cepheids which is important in addressing possible systematics. As the SBF method has the ability to reach larger distances than Cepheids, the impending entry of LSST and JWST into operation will increase the number of SNe Ia hosted in galaxies where SBF distances can be measured, making SBF measurements attractive for improving the calibration of SNe Ia, and in the estimation of $H_0$.