1. Statistical Correlation between the Distribution of Lyα Emitters and Intergalactic Medium Hi at z∼2.2 Mapped by the Subaru/Hyper Suprime-Cam
- Author
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Nobunari Kashikawa, Masayuki Tanaka, Ikkoh Shimizu, Kei Ito, Zheng Cai, Jun Toshikawa, Kentaro Nagamine, Xiaohui Fan, J. Xavier Prochaska, Hisakazu Uchiyama, Rhythm Shimakawa, Masafusa Onoue, Yongming Liang, and Kazuhiro Shimasaku
- Subjects
Physics ,Distribution (number theory) ,Space and Planetary Science ,Intergalactic medium ,Galaxy formation and evolution ,Astronomy and Astrophysics ,Astrophysics ,Statistical correlation - Abstract
he correlation between neutral hydrogen (H i) in the intergalactic medium (IGM) and galaxies attracts great interest. We select four fields that include several coherently strong Lyα absorption systems at z ∼ 2.2 detected using background quasars from the whole SDSS/(e) Baryon Oscillation Spectroscopic Survey (BOSS) database. Deep narrowband and g-band imaging are performed using the Hyper Suprime-Cam on the Subaru Telescope. We select 2642 Lyα emitter (LAE) candidates at z = 2.177 ± 0.023 down to the Lyα luminosity of LLyα ≈ 2 × 1042 erg s−1 to construct the galaxy overdensity maps, covering an effective area of 5.39 deg2. Combining the sample with the Lyα absorption estimated from 64 (e) BOSS quasar spectra, we find a moderate to strong correlation between the LAE overdensity δLAE and the effective optical depth τLoS in lines of sight, with P value = 0.09% or
- Published
- 2021