The SSA22 HI 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

TL;DR
The SSA22-HIT survey provides a comprehensive spectroscopic redshift catalog of 730 galaxies at z > 2 in the SSA22 field, enabling detailed HI tomography and advancing high-redshift gas mapping.
Contribution
This study presents a new, extensive redshift catalog from SSA22-HIT, doubling the known redshifts at z > 3.2 and facilitating HI tomography at high redshift.
Findings
Redshift catalog contains 730 galaxies at z > 2.
Approximately twice as many redshifts at z > 3.2 compared to previous data.
About 40% of spectra have sufficient quality for analysis.
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 HI gas through analysis of Lya 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 x 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 x 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…
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsAstronomy and Astrophysical Research · Galaxies: Formation, Evolution, Phenomena · Scientific Research and Discoveries
