The Astrophysical Journal (Jan 2023)
HETDEX Public Source Catalog 1—Stacking 50,000 Lyman Alpha Emitters
- Dustin Davis,
- Karl Gebhardt,
- Erin Mentuch Cooper,
- William P. Bowman,
- Barbara Garcia Castanheira,
- John Chisholm,
- Robin Ciardullo,
- Maximilian Fabricius,
- Daniel J. Farrow,
- Steven L. Finkelstein,
- Caryl Gronwall,
- Eric Gawiser,
- Gary J. Hill,
- Ulrich Hopp,
- Lindsay R. House,
- Donghui Jeong,
- Wolfram Kollatschny,
- Eiichiro Komatsu,
- Chenxu Liu,
- Maja Lujan Niemeyer,
- Alberto Saldana-Lopez,
- Shun Saito,
- Donald P. Schneider,
- Jan Snigula,
- Sarah Tuttle,
- Laurel H. Weiss,
- Lutz Wisotzki,
- Gregory Zeimann
Affiliations
- Dustin Davis
- ORCiD
- Department of Astronomy, The University of Texas at Austin , Austin, TX 78712, USA
- Karl Gebhardt
- ORCiD
- Department of Astronomy, The University of Texas at Austin , Austin, TX 78712, USA
- Erin Mentuch Cooper
- ORCiD
- Department of Astronomy, The University of Texas at Austin , Austin, TX 78712, USA
- William P. Bowman
- ORCiD
- Department of Astronomy, Yale University , New Haven, CT 06520, USA
- Barbara Garcia Castanheira
- Department of Physics, Baylor University , Waco TX 76798, USA
- John Chisholm
- ORCiD
- Department of Astronomy, The University of Texas at Austin , Austin, TX 78712, USA
- Robin Ciardullo
- ORCiD
- Department of Astronomy & Astrophysics, The Pennsylvania State University , University Park, PA 16802, USA; Institute for Gravitation and the Cosmos, The Pennsylvania State University , University Park, PA 16802, USA
- Maximilian Fabricius
- ORCiD
- Max-Planck Institut für extraterrestrische Physik , Giessenbachstrasse 1, D-85748 Garching, Germany; Fakultät für Physik, Universitäts-Sternwarte, Ludwig-Maximilians Universität München , Scheinerstraße 1, D-81679 München, Germany
- Daniel J. Farrow
- ORCiD
- Centre of Excellence for Data Science, Artificial Intelligence and Modelling (DAIM), University of Hull , Cottingham Road, Kingston-upon-Hull, HU6 7RX, UK; E.A. Milne Centre for Astrophysics, University of Hull , Cottingham Road, Kingston-upon-Hull, HU6 7RX, UK
- Steven L. Finkelstein
- ORCiD
- Department of Astronomy, The University of Texas at Austin , Austin, TX 78712, USA
- Caryl Gronwall
- ORCiD
- Department of Astronomy & Astrophysics, The Pennsylvania State University , University Park, PA 16802, USA; Institute for Gravitation and the Cosmos, The Pennsylvania State University , University Park, PA 16802, USA
- Eric Gawiser
- ORCiD
- Department of Physics & Astronomy, Rutgers, The State University of New Jersey , Piscataway, NJ 08854, USA
- Gary J. Hill
- ORCiD
- Department of Astronomy, The University of Texas at Austin , Austin, TX 78712, USA; McDonald Observatory, The University of Texas at Austin , Austin, TX 78712, USA
- Ulrich Hopp
- ORCiD
- Max-Planck Institut für extraterrestrische Physik , Giessenbachstrasse 1, D-85748 Garching, Germany; Fakultät für Physik, Universitäts-Sternwarte, Ludwig-Maximilians Universität München , Scheinerstraße 1, D-81679 München, Germany
- Lindsay R. House
- ORCiD
- Department of Astronomy, The University of Texas at Austin , Austin, TX 78712, USA
- Donghui Jeong
- ORCiD
- Department of Astronomy & Astrophysics, The Pennsylvania State University , University Park, PA 16802, USA; Institute for Gravitation and the Cosmos, The Pennsylvania State University , University Park, PA 16802, USA
- Wolfram Kollatschny
- ORCiD
- Institut für Astrophysik, Universität Göttingen , Friedrich-Hund-Platz 1, D-37077 Göttingen, Germany
- Eiichiro Komatsu
- ORCiD
- Max-Planck-Institut für Astrophysik , Karl-Schwarzschild-Straße 1, D-85748 Garching, Germany; Kavli Institute for the Physics and Mathematics of the Universe (WPI), Todai Institutes for Advanced Study, The University of Tokyo , Kashiwanoha, Kashiwa, Chiba 277-8583, Japan
- Chenxu Liu
- ORCiD
- Department of Astronomy, The University of Texas at Austin , Austin, TX 78712, USA; South-Western Institute for Astronomy Research, Yunnan University , Kunming, Yunnan, 650500, Peoples Republic of China
- Maja Lujan Niemeyer
- ORCiD
- Max-Planck-Institut für Astrophysik , Karl-Schwarzschild-Straße 1, D-85748 Garching, Germany
- Alberto Saldana-Lopez
- ORCiD
- Department of Astronomy, University of Geneva , 51 Chemin Pegasi, 1290 Versoix, Switzerland
- Shun Saito
- ORCiD
- Kavli Institute for the Physics and Mathematics of the Universe (WPI), Todai Institutes for Advanced Study, The University of Tokyo , Kashiwanoha, Kashiwa, Chiba 277-8583, Japan; Institute for Multi-messenger Astrophysics and Cosmology, Department of Physics, Missouri University of Science and Technology , 1315 N. Pine Street, Rolla, MO 65409, USA
- Donald P. Schneider
- ORCiD
- Department of Astronomy & Astrophysics, The Pennsylvania State University , University Park, PA 16802, USA; Institute for Gravitation and the Cosmos, The Pennsylvania State University , University Park, PA 16802, USA
- Jan Snigula
- ORCiD
- Max-Planck Institut für extraterrestrische Physik , Giessenbachstrasse 1, D-85748 Garching, Germany; Fakultät für Physik, Universitäts-Sternwarte, Ludwig-Maximilians Universität München , Scheinerstraße 1, D-81679 München, Germany
- Sarah Tuttle
- ORCiD
- Department of Astronomy, University of Washington , Seattle, 3910 15th Avenue NE, Room C319, Seattle, WA 98195-0002, USA
- Laurel H. Weiss
- ORCiD
- Department of Astronomy, The University of Texas at Austin , Austin, TX 78712, USA
- Lutz Wisotzki
- Leibniz-Institut für Astrophysik Potsdam (AIP) , An der Sternwarte 16, D-14482 Potsdam, Germany
- Gregory Zeimann
- ORCiD
- Hobby Eberly Telescope, The University of Texas at Austin , Austin, TX, 78712, USA
- DOI
- https://doi.org/10.3847/1538-4357/ace4c2
- Journal volume & issue
-
Vol. 954,
no. 2
p. 209
Abstract
We describe the ensemble properties of the 1.9 < z < 3.5 Lyman alpha emitters (LAEs) found in the HETDEX survey’s first public data release, HETDEX Public Source Catalog 1. Stacking the low-resolution ( R ∼ 800) spectra greatly increases the signal-to-noise ratio (S/N), revealing spectral features otherwise hidden by noise, and we show that the stacked spectrum is representative of an average member of the set. The flux-limited, Ly α S/N restricted stack of 50,000 HETDEX LAEs shows the ensemble biweight average z ∼ 2.6 LAE to be a blue (UV continuum slope ∼ −2.4 and E(B – V) < 0.1), moderately bright ( M _UV ∼ −19.7) star-forming galaxy with strong Ly α emission (log L _Ly _α ∼ 42.8 and W _λ (Ly α ) ∼ 114 Å), and potentially significant leakage of ionizing radiation. The rest-frame UV light is dominated by a young, metal-poor stellar population with an average age of 5–15 Myr and metallicity of 0.2–0.3 Z _⊙ .
Keywords
