分类： 天文学 >> 天文学 提交时间： 2023-02-19
Dongsheng Sun
Ken Mawatari
Ouchi Masami
Yoshiaki Ono
Hidenobu Yajima
Yechi Zhang
Makito Abe
William P. Bowman
Erin Mentuch Cooper
Dustin Davis
Daniel J. Farrow
Karl Gebhardt
Gary J. Hill
Chenxu Liu
Donald P. Schneider
摘要： We present cosmological-scale 3-dimensional (3D) neutral hydrogen ({\sc Hi}) tomographic maps at $z=2-3$ over a total of 837 deg$^2$ in two blank fields that are developed with Ly$\alpha$ forest absorptions of 14,736 background Sloan Digital Sky Survey (SDSS) quasars at $z$=2.08-3.67. Using the tomographic maps, we investigate the large-scale ($\gtrsim 10$ $h^{-1}$cMpc) average {\sc Hi} radial profiles and two-direction profiles of the line-of-sight (LoS) and transverse (TS) directions around galaxies and AGN at $z=2-3$ identified by the Hobby-Eberly Telescope Dark Energy eXperiment (HETDEX) and SDSS surveys, respectively.The peak of the {\sc Hi} radial profile around galaxies is lower than the one around AGN, suggesting that the dark-matter halos of galaxies are less massive on average than those of AGN. The LoS profile of AGN is narrower than the TS profile, indicating the Kaiser effect. There exist ionized outskirts at $\gtrsim 30$ $h^{-1}$cMpc beyond {\sc Hi} rich structures of galaxies and AGN found in the LoS profiles that can be explained by the influence of high energy photons propagating over a long distance. Our findings indicate that the {\sc Hi} radial profile of AGN has transitions from proximity zones ($\lesssim$ a few $h^{-1}$cMpc) to the {\sc Hi} rich structures ($\sim 1-30$ $h^{-1}$cMpc) and the ionized outskirts ($\gtrsim 30$ $h^{-1}$cMpc). Although there is no significant dependence of AGN types (type-1 vs. type-2) on the {\sc Hi} profiles, the peaks of the radial profiles anti-correlate with AGN luminosities, suggesting that AGN's ionization effects are stronger than the gas mass differences.
分类： 天文学 >> 天文学 提交时间： 2023-02-19
Erin Mentuch Cooper
Karl Gebhardt
Dustin Davis
Daniel J. Farrow
Chenxu Liu
Gregory Zeimann
Robin Ciardullo
John J. Feldmeier
Niv Drory
Donghui Jeong
Barbara Benda
William P. Bowman
Michael Boylan-Kolchin
Oscar A. Chavez Ortiz
Maya H. Debski
Mona Dentler
Maximilian Fabricius
Rameen Farooq
Steven L. Finkelstein
Eric Gawiser
摘要： We present the first publicly released catalog of sources obtained from the
Hobby-Eberly Telescope Dark Energy Experiment (HETDEX). HETDEX is an integral
field spectroscopic survey designed to measure the Hubble expansion parameter
and angular diameter distance at 1.88
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