Tomoko L. Suzuki
The Interstellar Medium in [O iii]-selected Star-forming Galaxies at z ∼ 3.2
Suzuki, Tomoko L.; Kodama, Tadayuki; Onodera, Masato; Shimakawa, Rhythm; Hayashi, Masao; Tadaki, Ken-ichi; Koyama, Yusei; Tanaka, Ichi; Sobral, David; Smail, Ian; Best, Philip N.; Khostovan, Ali A.; Minowa, Yosuke; Yamamoto, Moegi
Authors
Tadayuki Kodama
Masato Onodera
Rhythm Shimakawa
Masao Hayashi
Ken-ichi Tadaki
Yusei Koyama
Ichi Tanaka
David Sobral
Ian Smail ian.smail@durham.ac.uk
Emeritus Professor
Philip N. Best
Ali A. Khostovan
Yosuke Minowa
Moegi Yamamoto
Abstract
We present new results from near-infrared spectroscopy with Keck/MOSFIRE of [O III]-selected galaxies at z ~ 3.2. With our H and K band spectra, we investigate the interstellar medium (ISM) conditions, such as ionization states and gas metallicities. [O III] emitters at z ~ 3.2 show a typical gas metallicity of 12 log O H 8.07 0.07 + = ( ) at * log 9.0 9. () – M M ~ 2 and 12 log O H 8.31 0.04 + = ( ) at * log 9.7 10.2 () – M M ~ when using the empirical calibration method. We compare the [O III] emitters at z ~ 3.2 with UV-selected galaxies and Lyα emitters at the same epoch and find that the [O III]-based selection does not appear to show any systematic bias in the selection of star-forming galaxies. Moreover, comparing with star-forming galaxies at z ~ 2 from the literature, our samples show similar ionization parameters and gas metallicities as those obtained by the previous studies that used the same calibration method. We find no strong redshift evolution in the ISM conditions between z ~ 3.2 and z ~ 2. Considering that the star formation rates at a fixed stellar mass also do not significantly change between the two epochs, our results support the idea that the stellar mass is the primary quantity to describe the evolutionary stages of individual galaxies at z > 2.
Citation
Suzuki, T. L., Kodama, T., Onodera, M., Shimakawa, R., Hayashi, M., Tadaki, K., …Yamamoto, M. (2017). The Interstellar Medium in [O iii]-selected Star-forming Galaxies at z ∼ 3.2. Astrophysical Journal, 849(1), Article 39. https://doi.org/10.3847/1538-4357/aa8df3
Journal Article Type | Article |
---|---|
Acceptance Date | Sep 18, 2017 |
Online Publication Date | Oct 27, 2017 |
Publication Date | Oct 27, 2017 |
Deposit Date | Nov 14, 2017 |
Publicly Available Date | Nov 14, 2017 |
Journal | Astrophysical Journal |
Print ISSN | 0004-637X |
Publisher | American Astronomical Society |
Peer Reviewed | Peer Reviewed |
Volume | 849 |
Issue | 1 |
Article Number | 39 |
DOI | https://doi.org/10.3847/1538-4357/aa8df3 |
Public URL | https://durham-repository.worktribe.com/output/1339997 |
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© 2017. The American Astronomical Society. All rights reserved.
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