The Astrophysical Journal (Jan 2024)
DESI Emission-line Galaxies: Unveiling the Diversity of [O ii] Profiles and Its Links to Star Formation and Morphology
- Ting-Wen Lan,
- J. Xavier Prochaska,
- John Moustakas,
- Małgorzata Siudek,
- J. Aguilar,
- S. Ahlen,
- D. Bianchi,
- D. Brooks,
- T. Claybaugh,
- S. Cole,
- K. Dawson,
- A. de la Macorra,
- P. Doel,
- J. E. Forero-Romero,
- E. Gaztañaga,
- S. Gontcho A Gontcho,
- G. Gutierrez,
- J. Guy,
- K. Honscheid,
- R. Kehoe,
- T. Kisner,
- A. Lambert,
- M. Landriau,
- A. Meisner,
- R. Miquel,
- A. Muñoz-Gutiérrez,
- J. A. Newman,
- C. Poppett,
- F. Prada,
- G. Rossi,
- E. Sanchez,
- M. Schubnell,
- H. Seo,
- D. Sprayberry,
- G. Tarlé,
- B. A. Weaver,
- H. Zou
Affiliations
- Ting-Wen Lan
- ORCiD
- Graduate Institute of Astrophysics and Department of Physics, National Taiwan University , No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan ; [email protected]
- J. Xavier Prochaska
- ORCiD
- Department of Astronomy and Astrophysics, University of California , Santa Cruz, 1156 High Street, Santa Cruz, CA 95065, USA; Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU), WPI, The University of Tokyo Institutes for Advanced Study (UTIAS), The University of Tokyo , Kashiwa, Chiba, Kashiwa 277-8583, Japan; Division of Science, National Astronomical Observatory of Japan , 2-21-1, Osawa, Mitaka, Tokyo 181-8588, Japan
- John Moustakas
- ORCiD
- Department of Physics and Astronomy, Siena College , 515 Loudon Road, Loudonville, NY 12211, USA
- Małgorzata Siudek
- ORCiD
- Institute of Space Sciences , ICE-CSIC, Campus UAB, Carrer de Can Magrans s/n, 08913 Bellaterra, Barcelona, Spain; Instituto Astrofísica de Canarias , C/ Via Lactea s/n, E38205 La Laguna, Spain
- J. Aguilar
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA
- S. Ahlen
- ORCiD
- Physics Dept., Boston University , 590 Commonwealth Avenue, Boston, MA 02215, USA
- D. Bianchi
- ORCiD
- Dipartimento di Fisica “Aldo Pontremoli,” Università degli Studi di Milano , Via Celoria 16, I-20133 Milano, Italy
- D. Brooks
- ORCiD
- Department of Physics & Astronomy, University College London , Gower Street, London, WC1E 6BT, UK
- T. Claybaugh
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA
- S. Cole
- ORCiD
- Institute for Computational Cosmology, Department of Physics, Durham University , South Road, Durham DH1 3LE, UK
- K. Dawson
- ORCiD
- Department of Physics and Astronomy, The University of Utah , 115 South 1400 East, Salt Lake City, UT 84112, USA
- A. de la Macorra
- ORCiD
- Instituto de Física, Universidad Nacional Autónoma de México , Cd. de México C.P. 04510, Mexico
- P. Doel
- Department of Physics & Astronomy, University College London , Gower Street, London, WC1E 6BT, UK
- J. E. Forero-Romero
- ORCiD
- Departamento de Física, Universidad de los Andes , Cra. 1 No. 18A-10, Edificio Ip, CP 111711, Bogotá, Colombia; Observatorio Astronómico, Universidad de los Andes , Cra. 1 No. 18A-10, Edificio H, CP 111711 Bogotá, Colombia
- E. Gaztañaga
- ORCiD
- Institute of Space Sciences , ICE-CSIC, Campus UAB, Carrer de Can Magrans s/n, 08913 Bellaterra, Barcelona, Spain; Institut d’Estudis Espacials de Catalunya (IEEC) , 08034 Barcelona, Spain; Institute of Cosmology and Gravitation, University of Portsmouth , Dennis Sciama Building, Portsmouth, PO1 3FX, UK
- S. Gontcho A Gontcho
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA
- G. Gutierrez
- Fermi National Accelerator Laboratory , PO Box 500, Batavia, IL 60510, USA
- J. Guy
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA
- K. Honscheid
- Center for Cosmology and AstroParticle Physics, The Ohio State University , 191 West Woodruff Avenue, Columbus, OH 43210, USA; Department of Physics, The Ohio State University , 191 West Woodruff Avenue, Columbus, OH 43210, USA; The Ohio State University , Columbus, 43210 OH, USA
- R. Kehoe
- ORCiD
- Department of Physics, Southern Methodist University , 3215 Daniel Avenue, Dallas, TX 75275, USA
- T. Kisner
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA
- A. Lambert
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA
- M. Landriau
- ORCiD
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA
- A. Meisner
- ORCiD
- NSF NOIRLab , 950 N. Cherry Avenue, Tucson, AZ 85719, USA
- R. Miquel
- ORCiD
- Institució Catalana de Recerca i Estudis Avançats , Passeig de Lluís Companys, 23, 08010 Barcelona, Spain; Institut de Física d’Altes Energies (IFAE) , The Barcelona Institute of Science and Technology, Campus UAB, 08193 Bellaterra Barcelona, Spain
- A. Muñoz-Gutiérrez
- Instituto de Física, Universidad Nacional Autónoma de México , Cd. de México C.P. 04510, Mexico
- J. A. Newman
- ORCiD
- Department of Physics & Astronomy and Pittsburgh Particle Physics, Astrophysics, and Cosmology Center (PITT PACC), University of Pittsburgh , 3941 O’Hara Street, Pittsburgh, PA 15260, USA
- C. Poppett
- Lawrence Berkeley National Laboratory , 1 Cyclotron Road, Berkeley, CA 94720, USA; Space Sciences Laboratory, University of California , Berkeley, 7 Gauss Way, Berkeley, CA 94720, USA; University of California , Berkeley, 110 Sproul Hall #5800 Berkeley, CA 94720, USA
- F. Prada
- ORCiD
- Instituto de Astrofísica de Andalucía (CSIC) , Glorieta de la Astronomía, s/n, E-18008 Granada, Spain
- G. Rossi
- Department of Physics and Astronomy, Sejong University , Seoul, 143-747, Republic of Korea
- E. Sanchez
- ORCiD
- CIEMAT , Avenida Complutense 40, E-28040 Madrid, Spain
- M. Schubnell
- Department of Physics, University of Michigan , Ann Arbor, MI 48109, USA; University of Michigan , Ann Arbor, MI 48109, USA
- H. Seo
- ORCiD
- Department of Physics & Astronomy, Ohio University , Athens, OH 45701, USA
- D. Sprayberry
- ORCiD
- NSF NOIRLab , 950 N. Cherry Avenue, Tucson, AZ 85719, USA
- G. Tarlé
- ORCiD
- University of Michigan , Ann Arbor, MI 48109, USA
- B. A. Weaver
- NSF NOIRLab , 950 N. Cherry Avenue, Tucson, AZ 85719, USA
- H. Zou
- ORCiD
- National Astronomical Observatories, Chinese Academy of Sciences , A20 Datun Road, Chaoyang District, Beijing, 100012, People's Republic of China
- DOI
- https://doi.org/10.3847/1538-4357/ad8f33
- Journal volume & issue
-
Vol. 977,
no. 2
p. 225
Abstract
We study the [O ii ] profiles of emission-line galaxies (ELGs) from the Early Data Release of the Dark Energy Spectroscopic Instrument (DESI). To this end, we decompose and classify the shape of [O ii ] profiles with the first two eigenspectra derived from principal component analysis. Our results show that DESI ELGs have diverse line profiles, which can be categorized into three main types: (1) narrow lines with a median width of ∼50 km s ^−1 , (2) broad lines with a median width of ∼80 km s ^−1 , and (3) two redshift systems with a median velocity separation of ∼150 km s ^−1 , i.e., double-peak galaxies. To investigate the connections between the line profiles and galaxy properties, we utilize the information from the COSMOS data set and compare the properties of ELGs, including star formation rate (SFR) and galaxy morphology, with the average properties of reference star-forming galaxies with similar stellar mass, sizes, and redshifts. Our findings show that, on average, DESI ELGs have a higher SFR and more asymmetrical/disturbed morphology than the reference galaxies. Moreover, we uncover a relationship between the line profiles, the excess SFR, and the excess asymmetry parameter, showing that DESI ELGs with broader [O ii ] line profiles have more disturbed morphology and higher SFR than the reference star-forming galaxies. Finally, we discuss possible physical mechanisms giving rise to the observed relationship and the implications of our findings on the galaxy clustering measurements, including the halo occupation distribution modeling of DESI ELGs and the observed excess velocity dispersion of the satellite ELGs.
Keywords
