Lyα Imaging around the Hyperluminous Dust-obscured Quasar W2246–0526 at z = 4.6

Author:

Luo 罗 Yibin 毅彬ORCID,Fan 范 Lulu 璐璐ORCID,Liang 梁 Yongming 永明ORCID,Hu 胡 Weida 维达ORCID,Wang 王 Junxian 俊贤ORCID,Zheng 郑 Zhen-ya 振亚ORCID,Lin 林 Zheyu 哲宇ORCID,Tao 陶 Bojun 柏钧,Lin 林 Zesen 泽森ORCID,Cai MinxuanORCID,Huang 黄 Mengqiu 梦秋ORCID,Wan 宛 Zhen 振ORCID,Tang 唐 Yongling 永灵

Abstract

Abstract Hot dust-obscured galaxies (hot DOGs) are a population of hyperluminous, heavily obscured quasars discovered by the Wide-field Infrared Survey Explorer all-sky survey at high redshift. Observations suggested the growth of these galaxies may be driven by mergers. Previous environmental studies have statistically shown hot DOGs may reside in dense regions. Here we use the Very Large Telescope narrowband and broadband imaging to search for Lyα emitters (LAEs) in the 6. 8 × 6. 8 field of the hot DOG W2246−0526 at z = 4.6. W2246−0526 is the most distant hot DOG. We find that there is an overdensity of LAEs in the W2246−0526 field compared with the blank fields. This is direct evidence that this most distant hot DOG is in an overdense environment on the Mpc scale, and the result relates to the merger origin of hot DOGs.

Funder

MOST ∣ National Key Research and Development Program of China

MOST ∣ National Natural Science Foundation of China

Publisher

American Astronomical Society

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