期刊
ASTROPHYSICAL JOURNAL
卷 903, 期 1, 页码 -出版社
IOP Publishing Ltd
DOI: 10.3847/1538-4357/abb81b
关键词
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资金
- National Science Foundation [AST-0926815]
- state of Texas
- US Air Force [AFRL FA9451-04-2-0355]
- Eberly College of Science at Pennsylvania State University
- Office of the Senior Vice President for Research at Pennsylvania State University
- World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan
- KAKENHI through Japan Society for the Promotion of Science [15H02064, 17H01110, 17H01114]
- JSPS through the JSPS Research Fellowship for Young Scientists
- Alfred P. Sloan Foundation
- U.S. Department of Energy Office of Science
- Center for High-Performance Computing at the University of Utah
- Brazilian Participation Group
- Carnegie Institution for Science
- Carnegie Mellon University
- Chilean Participation Group
- French Participation Group
- Harvard-Smithsonian Center for Astrophysics
- Instituto de Astrofisica de Canarias
- Johns Hopkins University
- Kavli Institute for the Physics and Mathematics of the Universe (IPMU)/University of Tokyo
- Korean Participation Group
- Lawrence Berkeley National Laboratory
- Leibniz Institut fur Astrophysik Potsdam (AIP)
- Max-Planck-Institut fur Astronomie (MPIA Heidelberg)
- Max-Planck-Institut fur Astrophysik (MPA Garching)
- Max-Planck-Institut fur Extraterrestrische Physik (MPE)
- National Astronomical Observatories of China
- New Mexico State University
- New York University
- University of Notre Dame
- Observatario Nacional/MCTI
- The Ohio State University
- Pennsylvania State University
- Shanghai Astronomical Observatory
- United Kingdom Participation Group
- Universidad Nacional Autonoma de Mexico
- University of Arizona
- University of Colorado Boulder
- University of Oxford
- University of Portsmouth
- University of Utah
- University of Virginia
- University of Washington
- University of Wisconsin
- Vanderbilt University
- Yale University
We present cosmological (30-400 Mpc) distributions of neutral hydrogen (H I) in the intergalactic medium (IGM) traced by Ly alpha emitters (LAEs) and QSOs at z = 2.1-2.5, selected with the data of the ongoing Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) and the eBOSS survey. Motivated by a previous study of Mukae et al., we investigate spatial correlations of LAEs and QSOs with H I tomography maps reconstructed from H I Ly alpha forest absorption in the spectra of background galaxies and QSOs obtained by the CLAMATO survey and this study, respectively. In the cosmological volume far from QSOs, we find that LAEs reside in regions of strong H Ii absorption, i.e., H I rich, which is consistent with results of previous galaxy-background QSO pair studies. Moreover, there is an anisotropy in the H I distribution plot of transverse and line-of-sight distances; on average the H II absorption peak is blueshifted by similar to 200 km s(-1) from the LAE Ly alpha redshift, reproducing the known average velocity offset between the Ly alpha emission redshift and the galaxy systemic redshift. We have identified a similar to 40 Mpc scale volume of H i underdensity that is a candidate for a giant H II bubble, where six QSOs and an LAE overdensity exist at < z > = 2.16. The coincidence of the QSO and LAE overdensities with the H I underdensity indicates that the ionizing photon radiation of the QSOs has created a highly ionized volume of multiple proximity zones in a matter overdensity. Our results suggest an evolutionary picture where H I gas in an overdensity of galaxies becomes highly photoionized when QSOs emerge in the galaxies.
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