arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2209.02546astro-ph.CO
收藏

基于Ia型超新星近红外观测的哈勃常数更新测量

An updated measurement of the Hubble constant from near-infrared observations of Type Ia supernovae

Lluís Galbany, Thomas de Jaeger, Adam G. Riess, Tomás E. Müller-Bravo, Suhail Dhawan, Kim Phan, Maximillian Stritzinger, Emir Karamehmetoglu, Bruno Leibundgut, … 展开作者

Lluís Galbany, Thomas de Jaeger, Adam G. Riess, Tomás E. Müller-Bravo, Suhail Dhawan, Kim Phan, Maximillian Stritzinger, Emir Karamehmetoglu, Bruno Leibundgut, Erik Peterson, W. D'Arcy Kenworthy, Joel Johansson, Kate Maguire, Saurabh W. Jha

AI总结:

利用SHOES样本的近红外Ia型超新星数据,通过高斯过程测量峰值星等,测得哈勃常数$H_0=72.3$ km/s/Mpc,精度2.8%,并指出增加校准样本和扩展红移可提升精度。

摘要:

我们利用SHOES项目通过造父变星周期-光度关系测量了附近星系距离的最新Ia型超新星(SNe Ia)样本,在近红外(NIR)波段给出了哈勃常数($H_0$)的测量结果。我们收集了多达19颗校准SNe Ia以及57颗哈勃流($z>0.01$)中SNe Ia的公开近红外测光数据,并通过高斯过程和样条插值直接测量它们在$J$和$H$波段的峰值星等。校准峰值星等与基于造父变星的距离一起用于估计每个波段的平均绝对星等,而哈勃流SNe则用于约束星等-红移关系的零点截距。我们的基线$H_0$结果在$J$波段为$72.3\pm1.4$(统计)$\pm1.4$(系统)km s$^{-1}$ Mpc$^{-1}$,在$H$波段为$72.3\pm1.3$(统计)$\pm1.4$(系统)km s$^{-1}$ Mpc$^{-1}$,其中系统不确定性包括多达21种分析变体的标准差、来自SHOES造父变星锚的0.7%距离尺度系统误差、测光零点系统误差以及宇宙方差系统误差。我们的最终测量在两个波段的精度均为2.8%。导致$H_0$变化最大的变体是将样本限制为CSP和CfA计划的SNe,值得注意的是这些是校准最好的,在两个波段均得出$H_0\sim75$ km s$^{-1}$ Mpc$^{-1}$。我们证明在近红外中,拉伸和红化校正仍然有助于标准化SN Ia近红外峰值星等。基于我们的结果,未来要提高利用近红外SNe Ia测量$H_0$的精度,需要增加校准SNe Ia的数量,能够将哈勃-勒梅特图扩展到更高红移,并纳入标准化程序以帮助减少近红外固有离散度。

英文摘要:

We present a measurement of the Hubble constant ($H_0$) using type Ia supernova (SNe Ia) in the near-infrared (NIR) from the recently updated sample of SNe Ia in nearby galaxies with distances measured via Cepheid period-luminosity relations by the SHOES project. We collect public near-infrared photometry of up to 19 calibrator SNe Ia and further 57 SNe Ia in the Hubble flow ($z>0.01$), and directly measure their peak magnitudes in the $J$ and $H$ band by Gaussian processes and spline interpolation. Calibrator peak magnitudes together with Cepheid-based distances are used to estimate the average absolute magnitude in each band, while Hubble-flow SNe are used to constrain the zero-point intercept of the magnitude-redshift relation. Our baseline result of $H_0$ is $72.3\pm1.4$ (stat) $\pm1.4$ (syst) km s$^{-1}$ Mpc$^{-1}$ in the $J$ band and $72.3\pm1.3$ (stat) $\pm1.4$ (syst) km s$^{-1}$ Mpc$^{-1}$ in the $H$ band, where the systematic uncertainties include the standard deviation of up to 21 variations of the analysis, the 0.7\% distance scale systematic from SHOES Cepheid anchors, a photometric zeropoint systematic, and a cosmic variance systematic. Our final measurement represents a measurement with a precision of 2.8\% in both bands. The variant with the largest change in $H_0$ is when limiting the sample to SNe from CSP and CfA programmes, noteworthy because these are the best calibrated, yielding $H_0\sim75$ km s$^{-1}$ Mpc$^{-1}$ in both bands. We demonstrate stretch and reddening corrections are still useful in the NIR to standardize SN Ia NIR peak magnitudes. Based on our results, in order to improve the precision of the $H_0$ measurement with SNe Ia in the NIR in the future, we would need to increase the number of calibrator SNe Ia, be able to extend the Hubble-Lemaître diagram to higher-z, and include standardization procedures to help reducing the NIR intrinsic scatter.

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。

↑