A measurement of the Hubble constant using galaxy redshift surveys

Yuting Wang, Lixin Xu, Gong-Bo Zhao

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Abstract

We perform a measurement of the Hubble constant, H 0, using the latest baryonic acoustic oscillation (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 ΛCDM model. Based on the Kullback─Leibler 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.
Original languageEnglish
Article number84
JournalThe Astrophysical Journal
Volume849
Issue number2
DOIs
Publication statusPublished - 6 Nov 2017

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