The Astronomical Journal (Jan 2023)
The SSA22 H i Tomography Survey (SSA22-HIT). I. Data Set and Compiled Redshift Catalog
- Ken Mawatari,
- Akio K. Inoue,
- Toru Yamada,
- Tomoki Hayashino,
- J. Xavier Prochaska,
- Khee-Gan Lee,
- Nicolas Tejos,
- Nobunari Kashikawa,
- Takuya Otsuka,
- Satoshi Yamanaka,
- David J. Schlegel,
- Yuichi Matsuda,
- Joseph F. Hennawi,
- Ikuru Iwata,
- Hideki Umehata,
- Shiro Mukae,
- Masami Ouchi,
- Yuma Sugahara,
- Yoichi Tamura
Affiliations
- Ken Mawatari
- ORCiD
- National Astronomical Observatory of Japan , Osawa 2-21-1, Mitaka, Tokyo 181-8588, Japan ; [email protected]; Institute for Cosmic Ray Research, The University of Tokyo , 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8582, Japan; Department of Environmental Science and Technology, Faculty of Design Technology, Osaka Sangyo University , 3-1-1, Nakagaito, Daito, Osaka, 574-8530, Japan
- Akio K. Inoue
- ORCiD
- Department of Environmental Science and Technology, Faculty of Design Technology, Osaka Sangyo University , 3-1-1, Nakagaito, Daito, Osaka, 574-8530, Japan; Department of Physics, School of Advanced Science and Engineering, Faculty of Science and Engineering, Waseda University , 3-4-1, Okubo, Shinjuku, Tokyo 169-8555, Japan; Waseda Research Institute for Science and Engineering, Faculty of Science and Engineering, Waseda University , 3-4-1, Okubo, Shinjuku, Tokyo 169-8555, Japan
- Toru Yamada
- Institute of Space Astronautical Science , Japan Aerospace Exploration Agency, Sagamihara, Kanagawa 252-5210, Japan; Astronomical Institute, Tohoku University , Aoba, Aramaki, Aoba-ku, Sendai, Miyagi, 980-8578, Japan
- Tomoki Hayashino
- Research Center for Neutrino Science, Graduate School of Science, Tohoku University , Aoba, Aramaki, Aoba-ku, Sendai, Miyagi, 980-8578, Japan
- J. Xavier Prochaska
- ORCiD
- University of California Observatories , Lick Observatory, 1156 High Street, Santa Cruz, CA 95064, USA; Department of Astronomy and Astrophysics, University of California at Santa Cruz , 1156 High Street, Santa Cruz, CA 95064, USA; Kavli Institute for the Physics and Mathematics of the Universe, The University of Tokyo , 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8583, Japan
- Khee-Gan Lee
- ORCiD
- Kavli Institute for the Physics and Mathematics of the Universe, The University of Tokyo , 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8583, Japan; Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA
- Nicolas Tejos
- ORCiD
- University of California Observatories , Lick Observatory, 1156 High Street, Santa Cruz, CA 95064, USA; Instituto de Física, Pontificia Universidad Católica de Valparaíso , Casilla 4059, Valparaíso, Chile
- Nobunari Kashikawa
- ORCiD
- National Astronomical Observatory of Japan , Osawa 2-21-1, Mitaka, Tokyo 181-8588, Japan ; [email protected]; Department of Astronomy, Graduate School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan; The Graduate University for Advanced Studies (SOKENDAI) , Tokyo 181-8588, Japan
- Takuya Otsuka
- Astronomical Institute, Tohoku University , Aoba, Aramaki, Aoba-ku, Sendai, Miyagi, 980-8578, Japan
- Satoshi Yamanaka
- ORCiD
- Department of Environmental Science and Technology, Faculty of Design Technology, Osaka Sangyo University , 3-1-1, Nakagaito, Daito, Osaka, 574-8530, Japan; Waseda Research Institute for Science and Engineering, Faculty of Science and Engineering, Waseda University , 3-4-1, Okubo, Shinjuku, Tokyo 169-8555, Japan; General Education Department, National Institute of Technology, Toba College , 1-1, Ikegami-cho, Toba, Mie 517-8501, Japan; Research Center for Space and Cosmic Evolution, Ehime University , 2-5, Bunkyo-cho, Matsuyama, Ehime 790-8577, Japan
- David J. Schlegel
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA
- Yuichi Matsuda
- ORCiD
- National Astronomical Observatory of Japan , Osawa 2-21-1, Mitaka, Tokyo 181-8588, Japan ; [email protected]
- Joseph F. Hennawi
- ORCiD
- Department of Physics, Broida Hall, University of California at Santa Barbara , Santa Barbara, CA 93106, USA; Max Planck Institute for Astronomy , Ko’´nigstuhl 17, D-69117 Heidelberg, Germany
- Ikuru Iwata
- ORCiD
- National Astronomical Observatory of Japan , Osawa 2-21-1, Mitaka, Tokyo 181-8588, Japan ; [email protected]; The Graduate University for Advanced Studies (SOKENDAI) , Tokyo 181-8588, Japan
- Hideki Umehata
- ORCiD
- Institute for Cosmic Ray Research, The University of Tokyo , 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8582, Japan; Institute of Advanced Research, Graduate School of Science, Nagoya University , Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8601, Japan; Department of Physics, Graduate School of Science, Nagoya University , Furocho, Chikusa, Nagoya 464-8602, Japan
- Shiro Mukae
- ORCiD
- Institute for Cosmic Ray Research, The University of Tokyo , 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8582, Japan; Department of Astronomy, Graduate School of Science, The University of Tokyo , 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
- Masami Ouchi
- ORCiD
- Institute for Cosmic Ray Research, The University of Tokyo , 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8582, Japan; Division of Science, National Astronomical Observatory of Japan , 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
- Yuma Sugahara
- ORCiD
- National Astronomical Observatory of Japan , Osawa 2-21-1, Mitaka, Tokyo 181-8588, Japan ; [email protected]; Institute for Cosmic Ray Research, The University of Tokyo , 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8582, Japan; Waseda Research Institute for Science and Engineering, Faculty of Science and Engineering, Waseda University , 3-4-1, Okubo, Shinjuku, Tokyo 169-8555, Japan
- Yoichi Tamura
- ORCiD
- Division of Particle and Astrophysical Science, Graduate School of Science, Nagoya University , Nagoya 464-8602, Japan; Institute of Astronomy, The University of Tokyo , 2-21-1 Osawa, Mitaka, Tokyo 181-0015, Japan
- DOI
- https://doi.org/10.3847/1538-3881/acb707
- Journal volume & issue
-
Vol. 165,
no. 5
p. 208
Abstract
We conducted a deep spectroscopic survey, named SSA22-HIT, in the SSA22 field with the DEep Imaging MultiObject Spectrograph (DEIMOS) on the Keck telescope, designed to tomographically map high- z H i gas through analysis of Ly α absorption in background galaxies’ spectra. In total, 198 galaxies were spectroscopically confirmed at 2.5 2 is useful for various applications, and it is made publicly available. Our SSA22-HIT survey has increased by approximately twice the number of spectroscopic redshifts of sources at z > 3.2 in the observed field. From a comparison with publicly available redshift catalogs, we show that our compiled redshift catalog in the SSA22 field is comparable to those among major extragalactic survey fields in terms of a combination of wide area and high surface number density of objects at z > 2. About 40% of the spectroscopically confirmed objects in SSA22-HIT show reasonable quality of spectra in the wavelengths shorter than Ly α when a sufficient amount of smoothing is adopted. Our data set enables us to make the H i tomographic map at z ≳ 3, which we present in a parallel study.
Keywords
