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Title: Large-scale clustering of Lymanα emission intensity from SDSS/BOSS

Journal Article · · Monthly Notices of the Royal Astronomical Society
DOI:https://doi.org/10.1093/mnras/stw204· OSTI ID:1260149
 [1];  [2];  [3];  [3];  [3];  [4];  [5];  [6];  [7];  [3];  [8];  [9];  [10];  [11];  [12];  [13];  [9];  [14];  [15];  [16] more »;  [10];  [17];  [10];  [18];  [19];  [19];  [20];  [21];  [9] « less
  1. Carnegie Mellon Univ., Pittsburgh, PA (United States); Univ. of Oxford (United Kingdom). Dept. of Astrophysics
  2. Catalan Inst. for Research and Advanced Studies (ICREA), Barcelona (Spain); Univ. of Barcelona, Barcelona (Spain). Inst. of Sciences of the Cosmos
  3. Univ. of Utah, Salt Lake City, UT (United States). Dept. of Physics and Astronomy
  4. Carnegie Mellon Univ., Pittsburgh, PA (United States)
  5. Univ. of Chicago, IL (United States)
  6. Harvard Univ., Cambridge, MA (United States)
  7. Apache Point Observatory, Sunspot, NM (United States)
  8. Princeton Univ., NJ (United States). Dept. of Astrophysical Sciences
  9. Alternative Energies and Atomic Energy Commission (CEA), Saclay (France)
  10. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  11. CNRS/IN2P3. Univ. Paris (France). Observatoire de Paris. AstroParticule et Cosmologie (APC)
  12. Max Planck Inst. fur Astronomie, Heidelberg (Germany)
  13. Univ. of Wyoming, Laramie, WY (United States)
  14. National Inst. for Astrophysics (INAF), Trieste (Italy). Trieste Astronomical Observatory
  15. Univ. of Paris at CNRS, Paris (France). Inst. of Astrophysics
  16. Aix-Marseille Univ.and CNRS, Marseille (France). Astrophysics Lab.
  17. Sejong Univ., Seoul (Korea, Republic of)
  18. Pennsylvania State Univ., University Park, PA (United States)
  19. Brookhaven National Lab. (BNL), Upton, NY (United States)
  20. National Inst. for Astrophysics (INAF), Trieste (Italy). Trieste Astronomical Observatory; Istituto Nazionale di Fisica Nucleare (INFN), Trieste (Italy)
  21. Ohio State Univ., Columbus, OH (United States)
+ Show Author Affiliations

We present a tentative detection of the large-scale structure of Ly α emission in the Universe at redshifts z = 2-3.5 by measuring the cross-correlation of Ly α surface brightness with quasars in Sloan Digital Sky Survey/Baryon Oscillation Spectroscopic Survey.We use amillion spectra targeting luminous red galaxies at z < 0.8, after subtracting a best-fitting model galaxy spectrum from each one, as an estimate of the high-redshift Ly α surface brightness. The quasar- Ly α emission cross-correlation is detected on scales 1 ~ 15 h -1 Mpc, with shape consistent with a Λ (CDM model with) Ω m = 0.30 +0.10 -0.07 . The predicted amplitude of this cross-correlation is proportional to the product of the mean Ly α surface brightness, (μ α ), the amplitude of mass fluctuations and the quasar and Ly α emission bias factors. We infer (μ α ) (b α /3) = (3.9 ± 0.9) × 10-21 erg s-1 cm-2 Å-1 arcsec-2, where b α is the Ly α emission bias. If star-forming galaxies dominate this emission, we find ρSFR = (0.28 ± 0.07)(3/b α ) yr -1 Mpc -3 . For b α = 3, this value is~30 times larger than previous estimates from individually detected Ly α emitters, but consistent with the total ρSFR derived from dust-corrected, continuum UV galaxy surveys, if most of the Ly α photons from these galaxies avoid dust absorption and are reemitted after diffusing in large gas haloes. Heating of intergalactic gas by He II photoionization from quasar radiation or jets may alternatively explain the detected correlation, and cooling radiation from gas in galactic haloes may also contribute. We also detect redshift space anisotropy of the quasar-Ly α emission cross-correlation, finding evidence at the 3.0σ level that it is radially elongated, which may be explained by radiative-transfer effects. Our measurements represent the first application of the intensity mapping technique to optical observations.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
SC0012704; AC02-98CH10886; NNX14AC89G; AST-1208891; AYA2012- 33938; AST-1009781; AST- 1109730; OCI-0749212; AC02-05CH11231
OSTI ID:
1260149
Alternate ID(s):
OSTI ID: 1379081
Report Number(s):
BNL-112269-2016-JA; KA2301020
Journal Information:
Monthly Notices of the Royal Astronomical Society, Vol. 457, Issue 4; ISSN 0035-8711
Publisher:
Royal Astronomical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 39 works
Citation information provided by
Web of Science

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Measurement of baryon acoustic oscillation correlations at z  = 2.3 with SDSS DR12 Ly α -Forests journal June 2017
High-redshift post-reionization cosmology with 21cm intensity mapping journal May 2018
Observational challenges in Lyα intensity mapping journal September 2016
Empowering line intensity mapping to study early galaxies journal September 2016
Cosmology with intensity mapping techniques using atomic and molecular lines journal September 2016
Cross-correlation of the cosmic 21-cm signal and Lyman α emitters during reionization journal April 2016
Impact of simulated 1/f noise for HI intensity mapping experiments journal May 2018
The role of galaxies and AGN in reionizing the IGM – I. Keck spectroscopy of 5 < z < 7 galaxies in the QSO field J1148+5251 journal May 2018
Radiative transfer distortions of Lyman α emitters: a new Fingers-of-God damping in the clustering in redshift space journal August 2019
User’s guide to extracting cosmological information from line-intensity maps journal December 2019
The Spectrum of the Universe journal February 2018
On Removing Interloper Contamination from Intensity Mapping Power Spectrum Measurements journal July 2016
Spectral line De-Confusion in an Intensity Mapping Survey journal November 2016
Cross-correlating Carbon Monoxide Line-intensity Maps with Spectroscopic and Photometric Galaxy Surveys journal February 2019
Measuring the EoR Power Spectrum without Measuring the EoR Power Spectrum journal April 2019
On the Detectability of Visible-wavelength Line Emission from the Local Circumgalactic and Intergalactic Medium journal May 2019
Optimally Mapping Large-scale Structures with Luminous Sources journal May 2019
Broadband Intensity Tomography: Spectral Tagging of the Cosmic UV Background journal June 2019
H α Emission and the Dependence of the Circumgalactic Cool Gas Fraction on Halo Mass journal January 2020
Emission Line Ratios for the Circumgalactic Medium and the “Bimodal” Nature of Galaxies journal October 2018
Cross-correlation of the cosmic 21-cm signal and Lyman Alpha Emitters during reionization text January 2016
On Removing Interloper Contamination from Intensity Mapping Power Spectrum Measurements text January 2016
Spectral Line De-confusion in an Intensity Mapping Survey text January 2016
Empowering line intensity mapping to study early galaxies text January 2016
Cosmology with intensity mapping techniques using atomic and molecular lines text January 2016
Impact of Simulated 1/f Noise for HI Intensity Mapping Experiments text January 2017
Measuring the EoR Power Spectrum Without Measuring the EoR Power Spectrum text January 2018
On the detectability of visible-wavelength line emission from the local circumgalactic and intergalactic medium text January 2019
Simulating the large-scale structure of HI intensity maps journal March 2016
Line-Intensity Mapping: 2017 Status Report preprint January 2017

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