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Discovery of a Damped Lyα Galaxy at z ∼ 3 toward the Quasar SDSS J011852+040644

Joshi, Ravi and Fumagalli, Michele and Srianand, Raghunathan and Noterdaeme, Pasquier and Petitjean, Patrick and Rafelski, Marc and Mackenzie, Ruari and Li, Qiong and Cai, Zheng and Martin, D. Christopher and Zou, Siwei and Wu, Xue-Bing and Jiang, Linhua and Ho, Luis C. (2021) Discovery of a Damped Lyα Galaxy at z ∼ 3 toward the Quasar SDSS J011852+040644. Astrophysical Journal, 908 (2). Art. No. 129. ISSN 1538-4357.

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We report the detection of the host galaxy of a damped Lyα system (DLA) with log N(H i) [cm⁻²] = 21.0 ± 0.10 at z ≈ 3.0091 toward the background quasar SDSS J011852+040644 using the Palomar Cosmic Web Imager at the Hale (P200) telescope. We detect Lyα emission in the dark core of the DLA trough at a 3.3σ confidence level, with Lyα luminosity of L(Lyα) = (3.8 ± 0.8) × 10⁴² erg s⁻¹, corresponding to a star formation rate of ≳2 M_⊙ yr⁻¹ (considering a lower limit on Lyα escape fraction f_(esc)^(Lyα) ~2%) as typical for Lyman break galaxies at these redshifts. The Lyα emission is blueshifted with respect to the systemic redshift derived from metal absorption lines by 281 ± 43 km s−1. The associated galaxy is at very small impact parameter of ⩽12 kpc from the background quasar, which is in line with the observed anticorrelation between column density and impact parameter in spectroscopic searches tracing the large-scale environments of DLA host galaxies.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Joshi, Ravi0000-0002-5535-4186
Fumagalli, Michele0000-0001-6676-3842
Srianand, Raghunathan0000-0002-9062-1921
Noterdaeme, Pasquier0000-0002-5777-1629
Rafelski, Marc0000-0002-9946-4731
Mackenzie, Ruari0000-0003-0417-385X
Li, Qiong0000-0002-3119-9003
Cai, Zheng0000-0001-8467-6478
Martin, D. Christopher0000-0002-8650-1644
Zou, Siwei0000-0002-3983-6484
Wu, Xue-Bing0000-0002-7350-6913
Jiang, Linhua0000-0003-4176-6486
Ho, Luis C.0000-0001-6947-5846
Additional Information:© 2021. The American Astronomical Society. Received 2019 September 4; revised 2020 November 10; accepted 2020 December 4; published 2021 February 18. We thank the anonymous referee for useful comments. This research uses data obtained through the Telescope Access Program (TAP). This work was supported by the National Key R&D Program of China (2016YFA0400702, 2016YFA0400703), the National Science Foundation of China (11473002, 11721303, 11533001) and China Postdoctoral Science Foundation Grants (2018M630024, 2019T120011). M.F. acknowledges support by the Science and Technology Facilities Council [grant No. ST/P000541/1]. This project has received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (grant agreement No. 757535). This project has received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (grant agreement No. 757535). This work has been supported by Fondazione Cariplo, grant No. 2018-2329. P.N. acknowledges support from the French Agence Nationale de la Recherche under grant No. ANR-17-CE31-0011-01. Observations obtained with the Hale Telescope at Palomar Observatory were obtained as part of an agreement between the National Astronomical Observatories, Chinese Academy of Sciences, and the California Institute of Technology. Funding for the Sloan Digital Sky Survey IV has been provided by the Alfred P. Sloan Foundation, the U.S. Department of Energy Office of Science, and the Participating Institutions. SDSS-IV acknowledges support and resources from the Center for High-Performance Computing at the University of Utah. The SDSS website is SDSS-IV is managed by the Astrophysical Research Consortium for the Participating Institutions of the SDSS Collaboration including the Brazilian Participation Group, the Carnegie Institution for Science, Carnegie Mellon University, the Chilean Participation Group, the French Participation Group, Harvard-Smithsonian Center for Astrophysics, Instituto de Astrofísica de Canarias, The Johns Hopkins University, Kavli Institute for the Physics and Mathematics of the Universe (IPMU)/University of Tokyo, Lawrence Berkeley National Laboratory, Leibniz Institut für Astrophysik Potsdam (AIP), Max-Planck-Institut für Astronomie (MPIA Heidelberg), Max-Planck-Institut für Astrophysik (MPA Garching), Max-Planck-Institut für Extraterrestrische Physik (MPE), National Astronomical Observatories of China, New Mexico State University, New York University, University of Notre Dame, Observatário Nacional/MCTI, The Ohio State University, Pennsylvania State University, Shanghai Astronomical Observatory, United Kingdom Participation Group, Universidad Nacional Autónoma de México, University of Arizona, University of Colorado Boulder, University of Oxford, University of Portsmouth, University of Utah, University of Virginia, University of Washington, University of Wisconsin, Vanderbilt University, and Yale University.
Group:Astronomy Department, Space Astrophysics Laboratory
Funding AgencyGrant Number
National Key Research and Development Program of China2016YFA0400702
National Key Basic Research Program of China2016YFA0400703
National Natural Science Foundation of China11473002
National Natural Science Foundation of China11721303
National Natural Science Foundation of China11533001
China Postdoctoral Science Foundation2018M630024
China Postdoctoral Science Foundation2019T120011
Science and Technology Facilities Council (STFC)ST/P000541/1
European Research Council (ERC)757535
Fondazione Cariplo2018-2329
Agence Nationale pour la Recherche (ANR)ANR-17-CE31-0011-01
Alfred P. Sloan FoundationUNSPECIFIED
Department of Energy (DOE)UNSPECIFIED
Participating InstitutionsUNSPECIFIED
Subject Keywords:Quasar absorption line spectroscopy ; Damped Lyα systems ; Star formation
Issue or Number:2
Classification Code:Unified Astronomy Thesaurus concepts: Quasar absorption line spectroscopy (1317); Damped Lyman-alpha systems (349); Star formation (1569)
Record Number:CaltechAUTHORS:20210222-100902868
Persistent URL:
Official Citation:Ravi Joshi et al 2021 ApJ 908 129
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:108134
Deposited By: George Porter
Deposited On:22 Feb 2021 23:33
Last Modified:22 Feb 2021 23:33

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