Intensity Mapping of Hα, Hβ, , and Lines at z?
Gong,Yan1,2; Cooray,Asantha2; Silva,Marta B.3; Zemcov,Michael4,5; Feng,Chang2; Santos,Mario G.6,7; Dore,Olivier5,8; Chen,Xuelei1,9,10
Source PublicationThe Astrophysical Journal
AbstractAbstract Intensity mapping is becoming a useful tool to study the large-scale structure of the universe through spatial variations in the integrated emission from galaxies and the intergalactic medium. We study intensity mapping of the , [O iii] 5007 ?, [O ii] 3727 ?, and lines at . The mean intensities of these four emission lines are estimated using the observed luminosity functions (LFs), cosmological simulations, and the star formation rate density (SFRD) derived from observations at . We calculate the intensity power spectra and consider the foreground contamination of other lines at lower redshifts. We use the proposed NASA small explorer SPHEREx (the Spectro-Photometer for the History of the universe, Epoch of Reionization, and Ices Explorer) as a case study for the detectability of the intensity power spectra of the four emission lines. We also investigate the cross-correlation with the 21 cm line probed by the Canadian Hydrogen Intensity Mapping Experiment (CHIME), Tianlai experiment and the Square Kilometer Array (SKA) at . We find both the auto and cross power spectra can be well measured for the Hα, [O iii] and [O ii] lines at , while it is more challenging for the Hβ line. Finally, we estimate the constraint on the SFRD from intensity mapping, and find we can reach an accuracy higher than 7% at , which is better than with the usual method of measurements using the LFs of galaxies.
Keywordcosmology: theory diffuse radiation intergalactic medium large-scale structure of universe
WOS IDIOP:0004-637X-835-2-273
PublisherThe American Astronomical Society
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Document Type期刊论文
Affiliation1.Key Laboratory for Computational Astrophysics, National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Beijing 100012, China
2.Department of Physics & Astronomy, University of California, Irvine, CA 92697, USA
3.Kapteyn Astronomical Institute, University of Groningen, Landleven 12, 9747AD Groningen, the Netherlands
4.Center for Detectors, School of Physics and Astronomy, Rochester Institute of Technology, Rochester, NY 14623, USA
5.NASA Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, MS 169-215, Pasadena, CA 91109, USA
6.Physics Department, University of the Western Cape, Cape Town 7535, South Africa
7.SKA SA, The Park, Park Road, Cape Town 7405, South Africa
8.California Institute of Technology, MC 249-17, Pasadena, CA 91125, USA
9.University of Chinese Academy of Sciences, Beijing 100049, China
10.Center of High Energy Physics, Peking University, Beijing 100871, China
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Gong,Yan,Cooray,Asantha,Silva,Marta B.,et al. Intensity Mapping of Hα, Hβ, , and Lines at z?
APA Gong,Yan.,Cooray,Asantha.,Silva,Marta B..,Zemcov,Michael.,Feng,Chang.,...&Chen,Xuelei.(2017).Intensity Mapping of Hα, Hβ, , and Lines at z?The Astrophysical Journal,835(2).
MLA Gong,Yan,et al."Intensity Mapping of Hα, Hβ, , and Lines at z?The Astrophysical Journal 835.2(2017).
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