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Title: The triply-ionized carbon forest from eBOSS: cosmological correlations with quasars in SDSS-IV DR14

Here, we present measurements of the cross-correlation of the triply-ionized carbon (CIV) forest with quasars using Sloan Digital Sky Survey Data Release 14. The study exploits a large sample of new quasars from the first two years of observations by the Extended Baryon Oscillation Spectroscopic Survey (eBOSS). The CIV forest is a weaker tracer of large-scale structure than the Lyα forest, but benefits from being accessible at redshifts z<2 where the quasar number density from eBOSS is high. Our data sample consists of 287,651 CIV forest quasars in the redshift range 1.4CIV=0.27 –0.14 –0.26 +0.16 +0.34 and its combination with the CIV linear transmission bias parameter is b CIV(1+β CIV)=–0.0183 –0.0014 –0.0029 +0.0013 +0.0025 (1σ and 2σ statistical errors) at the mean redshift z=2.00. Splitting the sample at z=2.2 to constrain the bias evolution with redshift yields the power-law exponent γ=0.60±0.63, indicating a significantly weaker redshift-evolution than for the Lyα forest linear transmission bias. Additionally, we demonstrate that CIV absorption has the potential to be used as a probe of baryon acoustic oscillations (BAO). While the current data set is insufficient for a detection of the BAO peak feature, the final quasar samples for redshifts 1.4
Authors:
 [1] ;  [1] ;  [2] ;  [3] ;  [4] ;  [2] ;  [5] ;  [2] ;  [2] ;  [3] ;  [6] ;  [7] ;  [1] ;  [8] ;  [9]
  1. Aix Marseille Univ., Marseille (France)
  2. Univ. of Utah, Salt Lake City, UT (United States)
  3. Univ. Pierre et Marie Curie Paris 6, Univ. Denis Diderot Paris, Paris Cedex (France)
  4. Brookhaven National Lab. (BNL), Upton, NY (United States)
  5. Apache Point Observatory, Sunspot, NM (United States)
  6. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  7. Univ. of Portsmouth, Portsmouth (United Kingdom)
  8. Univ. Paris-Saclay, Gif-sur-Yvette (France)
  9. The Pennsylvania State Univ., University Park, PA (United States)
Publication Date:
Report Number(s):
BNL-207846-2018-JAAM
Journal ID: ISSN 1475-7516
Grant/Contract Number:
SC0012704
Type:
Accepted Manuscript
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2018; Journal Issue: 05; Journal ID: ISSN 1475-7516
Publisher:
Institute of Physics (IOP)
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; baryon acoustic oscillations; cosmological parameters from LSS; dark energy experiments; Lyman alpha forest
OSTI Identifier:
1460817

Blomqvist, Michael, Pieri, Matthew M., du Mas des Bourboux, Helion, Busca, Nicolas G., Slosar, Anze, Bautista, Julian E., Brinkmann, Jonathan, Brownstein, Joel R., Dawson, Kyle, Agathe, Victoria de Sainte, Guy, Julien, Percival, Will J., Perez-Rafols, Ignasi, Rich, James, and Schneider, Donald P.. The triply-ionized carbon forest from eBOSS: cosmological correlations with quasars in SDSS-IV DR14. United States: N. p., Web. doi:10.1088/1475-7516/2018/05/029.
Blomqvist, Michael, Pieri, Matthew M., du Mas des Bourboux, Helion, Busca, Nicolas G., Slosar, Anze, Bautista, Julian E., Brinkmann, Jonathan, Brownstein, Joel R., Dawson, Kyle, Agathe, Victoria de Sainte, Guy, Julien, Percival, Will J., Perez-Rafols, Ignasi, Rich, James, & Schneider, Donald P.. The triply-ionized carbon forest from eBOSS: cosmological correlations with quasars in SDSS-IV DR14. United States. doi:10.1088/1475-7516/2018/05/029.
Blomqvist, Michael, Pieri, Matthew M., du Mas des Bourboux, Helion, Busca, Nicolas G., Slosar, Anze, Bautista, Julian E., Brinkmann, Jonathan, Brownstein, Joel R., Dawson, Kyle, Agathe, Victoria de Sainte, Guy, Julien, Percival, Will J., Perez-Rafols, Ignasi, Rich, James, and Schneider, Donald P.. 2018. "The triply-ionized carbon forest from eBOSS: cosmological correlations with quasars in SDSS-IV DR14". United States. doi:10.1088/1475-7516/2018/05/029.
@article{osti_1460817,
title = {The triply-ionized carbon forest from eBOSS: cosmological correlations with quasars in SDSS-IV DR14},
author = {Blomqvist, Michael and Pieri, Matthew M. and du Mas des Bourboux, Helion and Busca, Nicolas G. and Slosar, Anze and Bautista, Julian E. and Brinkmann, Jonathan and Brownstein, Joel R. and Dawson, Kyle and Agathe, Victoria de Sainte and Guy, Julien and Percival, Will J. and Perez-Rafols, Ignasi and Rich, James and Schneider, Donald P.},
abstractNote = {Here, we present measurements of the cross-correlation of the triply-ionized carbon (CIV) forest with quasars using Sloan Digital Sky Survey Data Release 14. The study exploits a large sample of new quasars from the first two years of observations by the Extended Baryon Oscillation Spectroscopic Survey (eBOSS). The CIV forest is a weaker tracer of large-scale structure than the Lyα forest, but benefits from being accessible at redshifts z<2 where the quasar number density from eBOSS is high. Our data sample consists of 287,651 CIV forest quasars in the redshift range 1.4CIV=0.27 –0.14 –0.26 +0.16 +0.34 and its combination with the CIV linear transmission bias parameter is bCIV(1+βCIV)=–0.0183 –0.0014 –0.0029 +0.0013 +0.0025 (1σ and 2σ statistical errors) at the mean redshift z=2.00. Splitting the sample at z=2.2 to constrain the bias evolution with redshift yields the power-law exponent γ=0.60±0.63, indicating a significantly weaker redshift-evolution than for the Lyα forest linear transmission bias. Additionally, we demonstrate that CIV absorption has the potential to be used as a probe of baryon acoustic oscillations (BAO). While the current data set is insufficient for a detection of the BAO peak feature, the final quasar samples for redshifts 1.4},
doi = {10.1088/1475-7516/2018/05/029},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 05,
volume = 2018,
place = {United States},
year = {2018},
month = {5}
}