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Title: The Extended Baryon Oscillation Spectroscopic Survey: Measuring the Cross-correlation between the Mg II Flux Transmission Field and Quasars and Galaxies at z = 0.59

Journal Article · · The Astrophysical Journal (Online)
ORCiD logo [1]; ORCiD logo [1];  [2];  [3];  [2];  [2]; ORCiD logo [4];  [5];  [1];  [6];  [3];  [3];  [7];  [8]; ORCiD logo [9]
  1. Univ. of Utah, Salt Lake City, UT (United States)
  2. Sorbonne Univ., Paris (France)
  3. Aix-Marseille Univ., and CNRS/IN2P3, Marseille (France)
  4. Univ. of Portsmouth (United Kingdom)
  5. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  6. Univ. of Wyoming, Laramie, WY (United States)
  7. Univ. Paris-Saclay, Gif-sur-Yvette (France)
  8. Pennsylvania State Univ., University Park, PA (United States)
  9. Brookhaven National Lab. (BNL), Upton, NY (United States)
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We introduce the first attempt at measuring the baryonic acoustic oscillations (BAOs) in the large-scale cross-correlation between the magnesium-II doublet Mg II) flux transmission field and the position of quasar and galaxy tracers. The Mg II flux transmission continuous field at 0.3 < z < 1.6 is measured from 500,589 quasar spectra obtained in the Baryonic Oscillation Spectroscopic Survey (BOSS) and the extended BOSS (eBOSS). The positions of 246,697 quasar tracers and 1346,776 galaxy tracers are extracted from the Sloan Digital Sky Survey I and II, BOSS, and eBOSS catalogs. In addition to measuring the cosmological BAO scale and the biased matter density correlation, this work allows tests and improvements to cosmological Lyα analyses. A feature consistent with that of the BAOs is detected at a significance of Δχ2 = 7.25. The measured Mg II linear transmission bias parameters are bMg II(2796) (z = 0.59) = (-6.82 ± 0.54) × 10-4 and b Mg II(2804) (z = 0.59) = (-5.55 ± 0.46) ×10-4, and the Mg I bias is b Mg I(2853) (z = 0.59) = (-1.48 ± 0.24) × 10-4. Their redshift evolution is characterized by the power-law index: γ Mg = 3.36 ± 0.46. Moroever, these measurements open a new window toward using BAOs from flux transmission at z < 1 in the final eBOSS sample and in the upcoming sample from the Dark Energy Spectroscopic Instrument.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
SC0012704
OSTI ID:
1543395
Report Number(s):
BNL-211878-2019-JAAM
Journal Information:
The Astrophysical Journal (Online), Vol. 878, Issue 1; ISSN 1538-4357
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 12 works
Citation information provided by
Web of Science

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Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
baryons
oscillation
quasars
spectroscopic
cosmology