Title: The clustering of theSDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: measuring the anisotropic baryon acoustic oscillations with redshift weights

Abstract

We present an anisotropic analysis of baryon acoustic oscillation (BAO) signal from the Sloan Digital Sky Survey IV extended Baryon Oscillation Spectroscopic Survey Data Release 14 quasar sample. The sample consists of 147 000 quasars distributed over a redshift range of 0.8 < z < 2.2. We apply the redshift weights technique to the clustering of quasars in this sample and achieve a 4.6 per cent measurement of the angular distance measurement DM at z = 2.2 and Hubble parameter H at z = 0.8. We parametrize the distance-redshift relation, relative to a fiducial model, as a Taylor series. The coefficients of this expansion are used to reconstruct the distance-redshift relation and obtain distance and Hubble parameter measurements at all redshifts within the redshift range of the sample. Reporting the result at two characteristic redshifts, we determine DM(z = 1) = 3405 ± 305 (rd/rd, fid) Mpc, H(z=1) = 120.7± 7.3 (r_d,fid / r_d) km s^{-1} Mpc^{-1} and DM(z = 2) = 5325 ± 249 (rd/rd, fid) Mpc, H(z=2) = 189.9± 32.9 (r_d,fid / r_d) km s^{-1} Mpc^{-1}. These measurements are highly correlated. We assess the outlook of BAO analysis from the final quasar sample by testing the method onmore » a set of mocks that mimic the noise level in the final sample. We demonstrate on these mocks that redshift weighting shrinks the measurement error by over 25 per cent on average. We conclude redshift weighting can bring us closer to the cosmological goal of the final quasar sample.« less

Authors:

Zhu, Fangzhou ^[1]; Padmanabhan, Nikhil  ^[1];

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Ross, Ashley J.  ^[2];

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White, Martin  ^[3];

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Percival, Will J. ^[4]; Ruggeri, Rossana ^[4]; Zhao, Gong-bo ^[5]; Wang, Dandan ^[6]; Mueller, Eva-Maria ^[4]; Burtin, Etienne ^[7]; Gil-Marín, Héctor ^[8]; Bautista, Julian ^[9]; Beutler, Florian  ^[10];

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Brinkmann, Jonathan ^[11]; Brownstein, Joel R.  ^[9];

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Dawson, Kyle ^[9]; de la Macorra, Axel ^[12]; Rossi, Graziano ^[13]; Schneider, Donald P. ^[14]; Tojeiro, Rita  ^[15]

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more »; Wang, Yuting ^[5] « less

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+ Show Author Affiliations

1. Yale Univ., New Haven, CT (United States)
2. The Ohio State Univ., Columbus, OH (United States)
3. Univ. of California, Berkeley, CA (United States)
4. Univ. of Portsmouth (United Kingdom). Inst. of Cosmology, Gravitation
5. Univ. of Portsmouth (United Kingdom). Inst. of Cosmology, Gravitation; Chinese Academy of Sciences (CAS), Beijing (China)
6. Chinese Academy of Sciences (CAS), Beijing (China)
7. Univ. Paris-Saclay, Gif-sur-Yvette (France)
8. Sorbonne Universités, Paris (France); Université Pierre et Marie Curie, Paris (France)
9. Univ. of Utah, Salt Lake City, UT (United States)
10. Univ. of Portsmouth (United Kingdom). Inst. of Cosmology, Gravitation; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
11. Apache Point Observatory, Sunspot, NM (United States)
12. Universidad Nacional Autónoma de México (Mexico)
13. Sejong Univ., Seoul (Korea, Republic of)
14. Pennsylvania State Univ., University Park, PA (United States). Inst. for Gravitation and the Cosmos
15. Univ. of St. Andrews, Scotland (United Kingdom)

Publication Date:

2018-07-23

Research Org.:

Univ. of California, Berkeley, CA (United States)

Sponsoring Org.:

USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF)

OSTI Identifier:

1594729

Alternate Identifier(s):

OSTI ID: 1593672

Grant/Contract Number:  

SC0017860; AC02-05CH11231; PHYS-1066293

Resource Type:

Accepted Manuscript

Journal Name:

Monthly Notices of the Royal Astronomical Society

Additional Journal Information:

Journal Volume: 480; Journal Issue: 1; Journal ID: ISSN 0035-8711

Publisher:

Royal Astronomical Society

Country of Publication:

United States

Language:

English

Subject:

79 ASTRONOMY AND ASTROPHYSICS; dark energy; distance scale; cosmology: observations