The SSA22 H i Tomography Survey (SSA22-HIT). I. Data Set and Compiled Redshift Catalog
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 wer...
| Main Authors: | , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | The Astronomical Journal |
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| Online Access: | https://doi.org/10.3847/1538-3881/acb707 |
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| author | 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 |
| author_facet | 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 |
| author_sort | Ken Mawatari |
| collection | DOAJ |
| description | 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 < z < 6 with a few low- z exceptions in the 26 × 15 arcmin ^2 area, of which 148 were newly determined in this study. Our redshift measurements were merged with previously confirmed redshifts available in the 34 × 27 arcmin ^2 area of the SSA22 field. This compiled catalog containing 730 galaxies of various types at z > 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. |
| first_indexed | 2024-03-12T03:38:29Z |
| format | Article |
| id | doaj.art-33d1fab7a79a4565ae4050b446fe2a82 |
| institution | Directory Open Access Journal |
| issn | 1538-3881 |
| language | English |
| last_indexed | 2024-03-12T03:38:29Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astronomical Journal |
| spelling | doaj.art-33d1fab7a79a4565ae4050b446fe2a822023-09-03T13:05:59ZengIOP PublishingThe Astronomical Journal1538-38812023-01-01165520810.3847/1538-3881/acb707The SSA22 H i Tomography Survey (SSA22-HIT). I. Data Set and Compiled Redshift CatalogKen Mawatari0https://orcid.org/0000-0003-4985-0201Akio K. Inoue1https://orcid.org/0000-0002-7779-8677Toru Yamada2Tomoki Hayashino3J. Xavier Prochaska4https://orcid.org/0000-0002-7738-6875Khee-Gan Lee5https://orcid.org/0000-0001-9299-5719Nicolas Tejos6https://orcid.org/0000-0002-1883-4252Nobunari Kashikawa7https://orcid.org/0000-0003-3954-4219Takuya Otsuka8Satoshi Yamanaka9https://orcid.org/0000-0002-7738-5290David J. Schlegel10https://orcid.org/0000-0002-5042-5088Yuichi Matsuda11https://orcid.org/0000-0003-1747-2891Joseph F. Hennawi12https://orcid.org/0000-0002-7054-4332Ikuru Iwata13https://orcid.org/0000-0002-2162-8804Hideki Umehata14https://orcid.org/0000-0003-1937-0573Shiro Mukae15https://orcid.org/0000-0003-3823-8279Masami Ouchi16https://orcid.org/0000-0002-1049-6658Yuma Sugahara17https://orcid.org/0000-0001-6958-7856Yoichi Tamura18https://orcid.org/0000-0003-4807-8117National Astronomical Observatory of Japan , Osawa 2-21-1, Mitaka, Tokyo 181-8588, Japan ; ken.mawatari@nao.ac.jp; 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, JapanDepartment 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, JapanInstitute 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, JapanResearch Center for Neutrino Science, Graduate School of Science, Tohoku University , Aoba, Aramaki, Aoba-ku, Sendai, Miyagi, 980-8578, JapanUniversity 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, JapanKavli 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, USAUniversity of California Observatories , Lick Observatory, 1156 High Street, Santa Cruz, CA 95064, USA; Instituto de Física, Pontificia Universidad Católica de Valparaíso , Casilla 4059, Valparaíso, ChileNational Astronomical Observatory of Japan , Osawa 2-21-1, Mitaka, Tokyo 181-8588, Japan ; ken.mawatari@nao.ac.jp; 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, JapanAstronomical Institute, Tohoku University , Aoba, Aramaki, Aoba-ku, Sendai, Miyagi, 980-8578, JapanDepartment 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, JapanLawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USANational Astronomical Observatory of Japan , Osawa 2-21-1, Mitaka, Tokyo 181-8588, Japan ; ken.mawatari@nao.ac.jpDepartment 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, GermanyNational Astronomical Observatory of Japan , Osawa 2-21-1, Mitaka, Tokyo 181-8588, Japan ; ken.mawatari@nao.ac.jp; The Graduate University for Advanced Studies (SOKENDAI) , Tokyo 181-8588, JapanInstitute 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, JapanInstitute 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, JapanInstitute 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, JapanNational Astronomical Observatory of Japan , Osawa 2-21-1, Mitaka, Tokyo 181-8588, Japan ; ken.mawatari@nao.ac.jp; 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, JapanDivision 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, JapanWe 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 < z < 6 with a few low- z exceptions in the 26 × 15 arcmin ^2 area, of which 148 were newly determined in this study. Our redshift measurements were merged with previously confirmed redshifts available in the 34 × 27 arcmin ^2 area of the SSA22 field. This compiled catalog containing 730 galaxies of various types at z > 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.https://doi.org/10.3847/1538-3881/acb707Redshift surveysHigh-redshift galaxiesCatalogsIntergalactic medium |
| spellingShingle | 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 The SSA22 H i Tomography Survey (SSA22-HIT). I. Data Set and Compiled Redshift Catalog The Astronomical Journal Redshift surveys High-redshift galaxies Catalogs Intergalactic medium |
| title | The SSA22 H i Tomography Survey (SSA22-HIT). I. Data Set and Compiled Redshift Catalog |
| title_full | The SSA22 H i Tomography Survey (SSA22-HIT). I. Data Set and Compiled Redshift Catalog |
| title_fullStr | The SSA22 H i Tomography Survey (SSA22-HIT). I. Data Set and Compiled Redshift Catalog |
| title_full_unstemmed | The SSA22 H i Tomography Survey (SSA22-HIT). I. Data Set and Compiled Redshift Catalog |
| title_short | The SSA22 H i Tomography Survey (SSA22-HIT). I. Data Set and Compiled Redshift Catalog |
| title_sort | ssa22 h i tomography survey ssa22 hit i data set and compiled redshift catalog |
| topic | Redshift surveys High-redshift galaxies Catalogs Intergalactic medium |
| url | https://doi.org/10.3847/1538-3881/acb707 |
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