The Astrophysical Journal (Jan 2023)
A Spatially Resolved Analysis of Star Formation Burstiness by Comparing UV and Hα in Galaxies at z ∼ 1 with UVCANDELS
- Vihang Mehta,
- Harry I. Teplitz,
- Claudia Scarlata,
- Xin Wang,
- Anahita Alavi,
- James Colbert,
- Marc Rafelski,
- Norman Grogin,
- Anton Koekemoer,
- Laura Prichard,
- Rogier Windhorst,
- Justin M. Barber,
- Christopher J. Conselice,
- Y. Sophia Dai,
- Jonathan P. Gardner,
- Eric Gawiser,
- Yicheng Guo,
- Nimish Hathi,
- Pablo Arrabal Haro,
- Matthew Hayes,
- Kartheik G. Iyer,
- Rolf A. Jansen,
- Zhiyuan Ji,
- Peter Kurczynski,
- Maxwell Kuschel,
- Ray A. Lucas,
- Kameswara Mantha,
- Robert W. O’Connell,
- Swara Ravindranath,
- Brant E. Robertson,
- Michael Rutkowski,
- Brian Siana,
- L. Y. Aaron Yung
Affiliations
- Vihang Mehta
- ORCiD
- IPAC, Mail Code 314-6, California Institute of Technology , 1200 E. California Boulevard, Pasadena, CA 91125, USA ; [email protected]
- Harry I. Teplitz
- ORCiD
- IPAC, Mail Code 314-6, California Institute of Technology , 1200 E. California Boulevard, Pasadena, CA 91125, USA ; [email protected]
- Claudia Scarlata
- ORCiD
- Minnesota Institute for Astrophysics, University of Minnesota , 116 Church Street SE, Minneapolis, MN 55455, USA
- Xin Wang
- ORCiD
- IPAC, Mail Code 314-6, California Institute of Technology , 1200 E. California Boulevard, Pasadena, CA 91125, USA ; [email protected]; School of Astronomy and Space Science, University of Chinese Academy of Sciences (UCAS) , Beijing 100049, People’s Republic of China; National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, People’s Republic of China
- Anahita Alavi
- ORCiD
- IPAC, Mail Code 314-6, California Institute of Technology , 1200 E. California Boulevard, Pasadena, CA 91125, USA ; [email protected]
- James Colbert
- ORCiD
- IPAC, Mail Code 314-6, California Institute of Technology , 1200 E. California Boulevard, Pasadena, CA 91125, USA ; [email protected]
- Marc Rafelski
- ORCiD
- Space Telescope Science Institute , Baltimore, MD 21218, USA
- Norman Grogin
- ORCiD
- Space Telescope Science Institute , Baltimore, MD 21218, USA
- Anton Koekemoer
- ORCiD
- Space Telescope Science Institute , Baltimore, MD 21218, USA
- Laura Prichard
- ORCiD
- Space Telescope Science Institute , Baltimore, MD 21218, USA
- Rogier Windhorst
- ORCiD
- School of Earth & Space Exploration, Arizona State University , Tempe, AZ 85287-1404, USA
- Justin M. Barber
- Department of Physics & Astronomy, University of California , Riverside, CA 92521, USA
- Christopher J. Conselice
- ORCiD
- Jodrell Bank Centre for Astrophysics, University of Manchester , Oxford Road, Manchester, UK
- Y. Sophia Dai
- ORCiD
- Chinese Academy of Sciences South America Center for Astronomy (CASSACA), National Astronomical Observatories (NAOC), 20A Datun Road, Beijing 100012, People’s Republic of China
- Jonathan P. Gardner
- ORCiD
- Astrophysics Science Division, NASA Goddard Space Flight Center, 8800 Greenbelt Road, Greenbelt, MD 20771, USA
- Eric Gawiser
- ORCiD
- Department of Physics and Astronomy, Rutgers, the State University of New Jersey , Piscataway, NJ 08854, USA
- Yicheng Guo
- ORCiD
- Department of Physics and Astronomy, University of Missouri , Columbia, MO 65211, USA
- Nimish Hathi
- ORCiD
- Space Telescope Science Institute , Baltimore, MD 21218, USA
- Pablo Arrabal Haro
- ORCiD
- NSF's National Optical-Infrared Astronomy Research Laboratory, 950 N. Cherry Avenue, Tucson, AZ 85719, USA
- Matthew Hayes
- ORCiD
- Department of Astronomy and Oskar Klein Centre, Stockholm University , AlbaNova University Centre, SE-10691, Stockholm, Sweden
- Kartheik G. Iyer
- ORCiD
- Dunlap Institute for Astronomy & Astrophysics, University of Toronto , Toronto, ON M5S 3H4, Canada
- Rolf A. Jansen
- ORCiD
- School of Earth & Space Exploration, Arizona State University , Tempe, AZ 85287-1404, USA
- Zhiyuan Ji
- ORCiD
- University of Massachusetts Amherst , 710 North Pleasant Street, Amherst, MA 01003-9305, USA
- Peter Kurczynski
- ORCiD
- Astrophysics Science Division, NASA Goddard Space Flight Center, 8800 Greenbelt Road, Greenbelt, MD 20771, USA
- Maxwell Kuschel
- ORCiD
- Minnesota Institute for Astrophysics, University of Minnesota , 116 Church Street SE, Minneapolis, MN 55455, USA
- Ray A. Lucas
- ORCiD
- Space Telescope Science Institute , Baltimore, MD 21218, USA
- Kameswara Mantha
- ORCiD
- Minnesota Institute for Astrophysics, University of Minnesota , 116 Church Street SE, Minneapolis, MN 55455, USA
- Robert W. O’Connell
- ORCiD
- Department of Astronomy, University of Virginia , Charlottesville, VA 22904-4325, USA
- Swara Ravindranath
- ORCiD
- Space Telescope Science Institute , Baltimore, MD 21218, USA
- Brant E. Robertson
- ORCiD
- Department of Astronomy and Astrophysics, University of California , Santa Cruz, 1156 High Street, Santa Cruz, CA 95064, USA
- Michael Rutkowski
- ORCiD
- Department of Physics and Astronomy, Minnesota State University-Mankato , Mankato, MN, USA
- Brian Siana
- ORCiD
- Department of Physics & Astronomy, University of California , Riverside, CA 92521, USA
- L. Y. Aaron Yung
- ORCiD
- Astrophysics Science Division, NASA Goddard Space Flight Center, 8800 Greenbelt Road, Greenbelt, MD 20771, USA
- DOI
- https://doi.org/10.3847/1538-4357/acd9cf
- Journal volume & issue
-
Vol. 952,
no. 2
p. 133
Abstract
The UltraViolet imaging of the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey Fields (UVCANDELS) program provides Hubble Space Telescope (HST)/UVIS F275W imaging for four CANDELS fields. We combine this UV imaging with existing HST/near-IR grism spectroscopy from 3D-HST+AGHAST to directly compare the resolved rest-frame UV and H α emission for a sample of 979 galaxies at 0.7 1.5), suggesting that bursty star formation is likely prevalent in the outskirts of even the most massive galaxies, but is likely overshadowed by their brighter cores. Furthermore, we present the UV-to-H α ratio as a function of galaxy surface brightness, a proxy for stellar mass surface density, and find that regions below ∼10 ^7.5 M _⊙ kpc ^−2 are consistent with bursty star formation, regardless of their galaxy stellar mass, potentially suggesting that local star formation is independent of global galaxy properties at the smallest scales. Last, we find galaxies at z > 1.1 to have bursty star formation, regardless of radius or surface brightness.
Keywords
