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arXiv 1706.09149astro-ph.CO
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利用星系红移巡天测量哈勃常数

A measurement of the Hubble constant using galaxy redshift surveys

Yuting Wang, Lixin Xu, Gong-Bo Zhao

摘要:

在一个平坦的$Λ$ CDM模型框架下,利用最新的6 dFGS、SDSS DR 7主星系样本、BOSS DR 12样本和eBOSS DR 14类星体样本的重子声振荡(BAO)测量结果,对哈勃常数$H_0$进行了测量.基于Kullback-Leibler(KL)分歧,我们检查了来自不同数据集的$H_0$值的一致性。我们发现,我们的测量是一致的,从普朗克和本地测量的$H_0$使用造父变星和Ia型超新星。我们进行预测$H_0$从未来的BAO测量,并发现,$H_0$的不确定性确定的未来BAO单独的数据,包括完整的eBOSS,DESI和欧几里得类,是可比的,从本地测量。

英文摘要:

We perform a measurement of the Hubble constant, $H_0$, using the latest baryonic acoustic oscillations (BAO) measurements from galaxy surveys of 6dFGS, SDSS DR7 Main Galaxy Sample, BOSS DR12 sample, and eBOSS DR14 quasar sample, in the framework of a flat $Λ$CDM model. Based on the Kullback-Leibler (KL) divergence, we examine the consistency of $H_0$ values derived from various data sets. We find that our measurement is consistent with that derived from Planck and with the local measurement of $H_0$ using the Cepheids and type Ia supernovae. We perform forecasts on $H_0$ from future BAO measurements, and find that the uncertainty of $H_0$ determined by future BAO data alone, including complete eBOSS, DESI and Euclid-like, is comparable with that from local measurements.

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。

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