TY - JOUR
T1 - The Extended Baryon Oscillation Spectroscopic Survey
T2 - Measuring the Cross-correlation between the Mg ii Flux Transmission Field and Quasars and Galaxies at z = 0.59
AU - Du Mas Des Bourboux, Hélion
AU - Dawson, Kyle S.
AU - Busca, Nicolás G.
AU - Blomqvist, Michael
AU - Agathe, Victoria De Sainte
AU - Balland, Christophe
AU - Bautista, Julian E.
AU - Guy, Julien
AU - Kamble, Vikrant
AU - Myers, Adam D.
AU - Pérez-Rafols, Ignasi
AU - Pieri, Matthew M.
AU - Rich, James
AU - Schneider, Donald P.
AU - Slosar, Anže
N1 - Publisher Copyright:
© 2019. The American Astronomical Society. All rights reserved.
PY - 2019/6/10
Y1 - 2019/6/10
N2 - We present 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 study allows tests and improvements to cosmological Lyα analyses. A feature consistent with that of the BAOs is detected at a significance of Δχ 2 = 7.25. The measured Mg ii linear transmission bias parameters are b Mg 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. 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.
AB - We present 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 study allows tests and improvements to cosmological Lyα analyses. A feature consistent with that of the BAOs is detected at a significance of Δχ 2 = 7.25. The measured Mg ii linear transmission bias parameters are b Mg 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. 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.
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U2 - 10.3847/1538-4357/ab1d49
DO - 10.3847/1538-4357/ab1d49
M3 - Article
AN - SCOPUS:85069540387
SN - 0004-637X
VL - 878
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 1
M1 - 47
ER -