HETDEX Public Source Catalog 1—Stacking 50,000 Lyman Alpha Emitters
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 feat...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/ace4c2 |
| _version_ | 1827822782705041408 |
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| author | 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 |
| author_facet | 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 |
| author_sort | Dustin Davis |
| collection | DOAJ |
| description | 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 _⊙ . |
| first_indexed | 2024-03-12T02:03:33Z |
| format | Article |
| id | doaj.art-c24f9931f6d4441fa336865fd9aadfd9 |
| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2024-03-12T02:03:33Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj.art-c24f9931f6d4441fa336865fd9aadfd92023-09-07T09:12:29ZengIOP PublishingThe Astrophysical Journal1538-43572023-01-01954220910.3847/1538-4357/ace4c2HETDEX Public Source Catalog 1—Stacking 50,000 Lyman Alpha EmittersDustin Davis0https://orcid.org/0000-0002-8925-9769Karl Gebhardt1https://orcid.org/0000-0002-8433-8185Erin Mentuch Cooper2https://orcid.org/0000-0002-2307-0146William P. Bowman3https://orcid.org/0000-0003-4381-5245Barbara Garcia Castanheira4John Chisholm5https://orcid.org/0000-0002-0302-2577Robin Ciardullo6https://orcid.org/0000-0002-1328-0211Maximilian Fabricius7https://orcid.org/0000-0002-7025-6058Daniel J. Farrow8https://orcid.org/0000-0003-2575-0652Steven L. Finkelstein9https://orcid.org/0000-0001-8519-1130Caryl Gronwall10https://orcid.org/0000-0001-6842-2371Eric Gawiser11https://orcid.org/0000-0003-1530-8713Gary J. Hill12https://orcid.org/0000-0001-6717-7685Ulrich Hopp13https://orcid.org/0000-0003-1008-225XLindsay R. House14https://orcid.org/0000-0002-1496-6514Donghui Jeong15https://orcid.org/0000-0002-8434-979XWolfram Kollatschny16https://orcid.org/0000-0002-0417-1494Eiichiro Komatsu17https://orcid.org/0000-0002-0136-2404Chenxu Liu18https://orcid.org/0000-0001-5561-2010Maja Lujan Niemeyer19https://orcid.org/0000-0002-6907-8370Alberto Saldana-Lopez20https://orcid.org/0000-0001-8419-3062Shun Saito21https://orcid.org/0000-0002-6186-5476Donald P. Schneider22https://orcid.org/0000-0001-7240-7449Jan Snigula23https://orcid.org/0000-0003-4044-5357Sarah Tuttle24https://orcid.org/0000-0002-7327-565XLaurel H. Weiss25https://orcid.org/0000-0002-4974-1243Lutz Wisotzki26Gregory Zeimann27https://orcid.org/0000-0003-2307-0629Department of Astronomy, The University of Texas at Austin , Austin, TX 78712, USADepartment of Astronomy, The University of Texas at Austin , Austin, TX 78712, USADepartment of Astronomy, The University of Texas at Austin , Austin, TX 78712, USADepartment of Astronomy, Yale University , New Haven, CT 06520, USADepartment of Physics, Baylor University , Waco TX 76798, USADepartment of Astronomy, The University of Texas at Austin , Austin, TX 78712, USADepartment 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, USAMax-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, GermanyCentre 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, UKDepartment of Astronomy, The University of Texas at Austin , Austin, TX 78712, USADepartment 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, USADepartment of Physics & Astronomy, Rutgers, The State University of New Jersey , Piscataway, NJ 08854, USADepartment of Astronomy, The University of Texas at Austin , Austin, TX 78712, USA; McDonald Observatory, The University of Texas at Austin , Austin, TX 78712, USAMax-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, GermanyDepartment of Astronomy, The University of Texas at Austin , Austin, TX 78712, USADepartment 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, USAInstitut für Astrophysik, Universität Göttingen , Friedrich-Hund-Platz 1, D-37077 Göttingen, GermanyMax-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, JapanDepartment 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 ChinaMax-Planck-Institut für Astrophysik , Karl-Schwarzschild-Straße 1, D-85748 Garching, GermanyDepartment of Astronomy, University of Geneva , 51 Chemin Pegasi, 1290 Versoix, SwitzerlandKavli 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, USADepartment 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, USAMax-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, GermanyDepartment of Astronomy, University of Washington , Seattle, 3910 15th Avenue NE, Room C319, Seattle, WA 98195-0002, USADepartment of Astronomy, The University of Texas at Austin , Austin, TX 78712, USALeibniz-Institut für Astrophysik Potsdam (AIP) , An der Sternwarte 16, D-14482 Potsdam, GermanyHobby Eberly Telescope, The University of Texas at Austin , Austin, TX, 78712, USAWe 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 _⊙ .https://doi.org/10.3847/1538-4357/ace4c2CatalogsEmission line galaxiesLyman-alpha galaxiesRedshift surveys |
| spellingShingle | 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 HETDEX Public Source Catalog 1—Stacking 50,000 Lyman Alpha Emitters The Astrophysical Journal Catalogs Emission line galaxies Lyman-alpha galaxies Redshift surveys |
| title | HETDEX Public Source Catalog 1—Stacking 50,000 Lyman Alpha Emitters |
| title_full | HETDEX Public Source Catalog 1—Stacking 50,000 Lyman Alpha Emitters |
| title_fullStr | HETDEX Public Source Catalog 1—Stacking 50,000 Lyman Alpha Emitters |
| title_full_unstemmed | HETDEX Public Source Catalog 1—Stacking 50,000 Lyman Alpha Emitters |
| title_short | HETDEX Public Source Catalog 1—Stacking 50,000 Lyman Alpha Emitters |
| title_sort | hetdex public source catalog 1 stacking 50 000 lyman alpha emitters |
| topic | Catalogs Emission line galaxies Lyman-alpha galaxies Redshift surveys |
| url | https://doi.org/10.3847/1538-4357/ace4c2 |
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