Physical and morphological properties of [o

Joanna S. Bridge, Caryl Ann Gronwall, Robin Bruce Ciardullo, Alex Hagen, Greg Zeimann, A. I. Malz, Viviana Acquaviva, Donald P. Schneider, Niv Drory, Karl Gebhardt, Shardha Jogee

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The Hobby-Eberly Dark Energy Experiment pilot survey identified 284 [O II] λ3727 emitting galaxies in a 169 arcmin2 field of sky in the redshift range 0 < z < 0.57. This line flux limited sample provides a bridge between studies in the local universe and higher-redshift [O II] surveys. We present an analysis of the star formation rates (SFRs) of these galaxies as a function of stellar mass as determined via spectral energy distribution fitting. The [O II] emitters fall on the "main sequence" of star-forming galaxies with SFR decreasing at lower masses and redshifts. However, the slope of our relation is flatter than that found for most other samples, a result of the metallicity dependence of the [O II] star formation rate indicator. The mass-specific SFR is higher for lower mass objects, supporting the idea that massive galaxies formed more quickly and efficiently than their lower mass counterparts. This is confirmed by the fact that the equivalent widths of the [O II] emission lines trend smaller with larger stellar mass. Examination of the morphologies of the [O II] emitters reveals that their star formation is not a result of mergers, and the galaxies' half-light radii do not indicate evolution of physical sizes.

Original languageEnglish (US)
Article number205
JournalAstrophysical Journal
Volume799
Issue number2
DOIs
StatePublished - Feb 1 2015

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star formation rate
physical properties
galaxies
stellar mass
emitters
spectral energy distribution
dark energy
metallicity
sky
star formation
merger
universe
examination
energy
slopes
trends
stars
radii
rate
experiment

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Bridge, Joanna S. ; Gronwall, Caryl Ann ; Ciardullo, Robin Bruce ; Hagen, Alex ; Zeimann, Greg ; Malz, A. I. ; Acquaviva, Viviana ; Schneider, Donald P. ; Drory, Niv ; Gebhardt, Karl ; Jogee, Shardha. / Physical and morphological properties of [o. In: Astrophysical Journal. 2015 ; Vol. 799, No. 2.
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Bridge, JS, Gronwall, CA, Ciardullo, RB, Hagen, A, Zeimann, G, Malz, AI, Acquaviva, V, Schneider, DP, Drory, N, Gebhardt, K & Jogee, S 2015, 'Physical and morphological properties of [o', Astrophysical Journal, vol. 799, no. 2, 205. https://doi.org/10.1088/0004-637X/799/2/205

Physical and morphological properties of [o. / Bridge, Joanna S.; Gronwall, Caryl Ann; Ciardullo, Robin Bruce; Hagen, Alex; Zeimann, Greg; Malz, A. I.; Acquaviva, Viviana; Schneider, Donald P.; Drory, Niv; Gebhardt, Karl; Jogee, Shardha.

In: Astrophysical Journal, Vol. 799, No. 2, 205, 01.02.2015.

Research output: Contribution to journalArticle

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AU - Hagen, Alex

AU - Zeimann, Greg

AU - Malz, A. I.

AU - Acquaviva, Viviana

AU - Schneider, Donald P.

AU - Drory, Niv

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AU - Jogee, Shardha

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