Cosmological 3D Hi Gas Map with HETDEX Lyα Emitters and eBOSS QSOs at z = 2: IGM-Galaxy/QSO Connection and a ∼ 40-Mpc Scale Giant Hii Bubble Candidate

dc.contributor.authorJarvis, Matt J.
dc.contributor.authorMukae, Shiro
dc.contributor.authorOuchi, Masami
dc.date.accessioned2021-02-17T11:39:00Z
dc.date.available2021-02-17T11:39:00Z
dc.date.issued2020
dc.description.abstractWe present cosmological (30−400 Mpc) distributions of neutral hydrogen (H i) in the intergalactic medium (IGM) traced by Lyα 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 Lyα 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 i 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 i absorption peak is blueshifted by ~200 km s−1 from the LAE Lyα redshift, reproducing the known average velocity offset between the Lyα emission redshift and the galaxy systemic redshift. We have identified a ~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 $\left\langle z\right\rangle =2.16$.en_US
dc.identifier.citationJarvis, M. J. et al. (2020). Cosmological 3D Hi Gas Map with HETDEX Lyα Emitters and eBOSS QSOs at z = 2: IGM-Galaxy/QSO Connection and a ∼ 40-Mpc Scale Giant Hii Bubble Candidate. The Astrophysical Journal, 903(1)en_US
dc.identifier.uri10.3847/1538-4357/abb81b
dc.identifier.urihttp://hdl.handle.net/10566/5950
dc.language.isoenen_US
dc.publisherIOP Publishingen_US
dc.subjectGalaxies: formationen_US
dc.subjectIntergalactic mediumen_US
dc.subjectLarge-scale structure of Universeen_US
dc.subjectNeutral hydrogenen_US
dc.subjecteBOSS surveyen_US
dc.titleCosmological 3D Hi Gas Map with HETDEX Lyα Emitters and eBOSS QSOs at z = 2: IGM-Galaxy/QSO Connection and a ∼ 40-Mpc Scale Giant Hii Bubble Candidateen_US
dc.typeArticleen_US

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