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Lyα view around a z = 2.84 hyperluminous QSO at a node of the cosmic web

Kikuta, Satoshi and Matsuda, Yuichi and Cen, Renyue and Steidel, Charles C. and Yagi, Masafumi and Hayashino, Tomoki and Imanishi, Masatoshi and Komiyama, Yutaka and Momose, Rieko and Saito, Tomoki (2019) Lyα view around a z = 2.84 hyperluminous QSO at a node of the cosmic web. Publications of the Astronomical Society of Japan, 71 (3). Art. No. L2. ISSN 0004-6264. https://resolver.caltech.edu/CaltechAUTHORS:20191025-154919609

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Abstract

We report on the results of deep and wide-field (1.1 deg²) narrow-band observations with Subaru/Hyper Suprime-Cam (HSC) of a field around a hyperluminous QSO (HLQSO), HS1549+1549+1919, residing in a protocluster at z = 2.84, to map the large-scale structure of Lyα emitters (LAEs). One HSC pointing enables us to detect 3490 LAEs and 76 extended Lyα blobs (LABs), probing diverse environments from voids to protoclusters. The HLQSO is found to be near the center of the protocluster, which corresponds to the intersection of ∼100 comoving Mpc-scale structures of LAEs. LABs are basically distributed along the large-scale structure, with larger ones particularly clustering around the HLQSO, confirming a previously noted tendency of LABs to prefer denser environments. Moreover, the shapes of LABs near the HLQSO appear to be aligned with the large-scale structure. Finally, a deep Lyα image reveals a diffuse Lyα nebula along a filamentary structure with no luminous UV/sub-mm counterpart. We suggest that the diffuse nebula is due to a cold filament with high clumping factor illuminated by the QSO, with the required high clumpiness provided by unresolved residing halos of mass ≤10⁹⁻¹⁰ M_⊙⁠.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1093/pasj/psz055DOIArticle
https://arxiv.org/abs/1904.07747arXivDiscussion Paper
ORCID:
AuthorORCID
Steidel, Charles C.0000-0002-4834-7260
Imanishi, Masatoshi0000-0001-6186-8792
Additional Information:© The Author(s) 2019. Published by Oxford University Press on behalf of the Astronomical Society of Japan. This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model). Received 2019 March 25; Accepted 2019 April 19. Published: 05 June 2019. Based on data collected at Subaru Telescope, which is operated by the National Astronomical Observatory of Japan. We thank Yukie Oishi and the HSC pipeline team for their helpful comments on HSC data analyses, the anonymous referee for his/her thoughtful comments, and Pimpunyawat Tummuangpak for reading the manuscript. We would like to acknowledge all who supported our observations with the Subaru Telescope, including the staffs of the National Astronomical Observatory of Japan, Mauna Kea Observatories, and the local Hawaiian people who have been making efforts to preserve and share the beautiful dark sky of Mauna Kea with us. Data analysis was carried out on the Multi-wavelength Data Analysis System operated by the Astronomy Data Center (ADC), National Astronomical Observatory of Japan. SK acknowledges supports from the Japan Society for the Promotion of Science (JSPS) KAKENHI grant No. 18J11477 and the Course-by-Course Education Program of SOKENDAI. YM acknowledges supports from the JSPS KAKENHI grant Nos. 25287043, 17H04831, 17KK0098. MI acknowledges supports from the JSPS KAKENHI grant No. 15K05030.
Group:Astronomy Department
Funders:
Funding AgencyGrant Number
Japan Society for the Promotion of Science (JSPS)18J11477
Graduate University for Advanced Studies (Japan)UNSPECIFIED
Japan Society for the Promotion of Science (JSPS)25287043
Japan Society for the Promotion of Science (JSPS)17H04831
Japan Society for the Promotion of Science (JSPS)17KK0098
Japan Society for the Promotion of Science (JSPS)15K05030
Subject Keywords:galaxies: formation (galaxies:) intergalactic medium galaxies: high-redshift (galaxies:) quasars: individual
Issue or Number:3
Record Number:CaltechAUTHORS:20191025-154919609
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20191025-154919609
Official Citation:Satoshi Kikuta, Yuichi Matsuda, Renyue Cen, Charles C Steidel, Masafumi Yagi, Tomoki Hayashino, Masatoshi Imanishi, Yutaka Komiyama, Rieko Momose, Tomoki Saito, Lyα view around a z = 2.84 hyperluminous QSO at a node of the cosmic web, Publications of the Astronomical Society of Japan, Volume 71, Issue 3, June 2019, L2, https://doi.org/10.1093/pasj/psz055
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:99469
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:25 Oct 2019 23:02
Last Modified:25 Oct 2019 23:02

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