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The SDSS-IV extended Baryon Oscillation Spectroscopic Survey: baryon acoustic oscillations at redshift of 0.72 with the DR14 luminous red galaxy sample

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Julian E. Bautista, Mariana Vargas-Magaña, Kyle S. Dawson, Will J. Percival, Jonathan Brinkmann, Joel Brownstein, Benjamin Camacho, Johan Comparat, Hector Gil-Marín, Eva-Maria Mueller, Jeffrey A. Newman, Abhishek Prakash, Ashley J. Ross, Donald P. Schneider, Hee-Jong Seo, Jeremy Tinker, Rita Tojeiro, Zhongzu Zhai, Gong-Bo Zhao

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The extended Baryon Oscillation Spectroscopic Survey (eBOSS) Data Release 14 sample includes 80,118 luminous red galaxies (LRGs). By combining these galaxies with the high-redshift tail of the BOSS galaxy sample, we form a sample of LRGs at an effective redshift z = 0.72, covering an effective volume of 0.9 Gpc3. We account for spurious fluctuations caused by targeting and by redshift failures, which were validated on a set of mock catalogs. This analysis is sufficient to provide a 2.5% measurement of spherically averaged baryon acoustic oscillations (BAO), DV(z=0.72) = 2377^{+61}_{-59} (rd/rd,fid) Mpc, at 2.8σ of significance. Together with the recent quasar-based BAO measurement at z = 1.5 and forthcoming emission line galaxy–based measurements, this measurement demonstrates that eBOSS is fulfilling its remit of extending the range of redshifts covered by such measurements, laying the groundwork for forthcoming surveys such as the Dark Energy Spectroscopic Survey and Euclid.


Original languageEnglish
Article number110
Number of pages17
JournalAstrophysical Journal
Publication statusPublished - 14 Aug 2018

    Research areas

  • Distance scale, Large-scale structure of universe

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ID: 252361739