@article{792771da6b74432c9d3911216ec05040,
title = "The interstellar medium in [OIII]-selected star-forming galaxies at z ∼ 3.2",
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(M* M) ~ 9.0-9.2 and 12 + log(O H) = 8.31 0.04 at log(M* M) ~ 9.7-10.2 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.",
keywords = "Galaxies: ISM, Galaxies: evolution, Galaxies: high-redshift",
author = "Tomoko Suzuki and Tadayuki Kodama and Masato Onodera and Rhythm Shimakawa and Masao Hayashi and Tadaki, {Ken Ichi} and Yusei Koyama and Ichi Tanaka and David Sobral and Ian Smail and Best, {Philip N.} and Khostovan, {Ali A.} and Yosuke Minowa and Moegi Yamamoto",
note = "Funding Information: We thank the anonymous referee for providing constructive comments. The spectroscopic data presented herein were obtained at the W.M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California, and the National Aeronautics and Space Administration. The Observatory was made possible by the generous financial support of the W.M. Keck Foundation. Observations (S16A-058) were carried out within the framework of the Subaru-Keck time exchange program, where the travel expense was supported by the Subaru Telescope, which is operated by the National Astronomical Observatory of Japan (NAOJ). The authors wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Maunakea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. We thank Carlos Alvarez and the rest of the Keck telescope staff for their help in the observation. Data analyses were in part carried out on the open use data analysis computer system at the Astronomy Data Center, ADC, of NAOJ. This work was supported in part by the Center for the Promotion of Integrated Sciences (CPIS) of SOKENDAI. T.L.S. acknowledges support from JSPS KAKENHI Grant Number JP16J07112. M.O. acknowledges support from JSPS KAKENHI Grant Number JP17K14257. I.S. acknowledges support from STFC (ST/P000541/1), the ERC Advanced Grant DUSTYGAL (321334) and a Royal Society/Wolfson Merit Award. Funding Information: Funding for SDSS-III has been provided by the Alfred P. Sloan Foundation, the Participating Institutions, the National Science Foundation, and the U.S. Department of Energy Office of Science. The SDSS-III web site is http://www. sdss3.org/. Publisher Copyright: {\textcopyright} 2017. The American Astronomical Society. All rights reserved.",
year = "2017",
month = nov,
day = "1",
doi = "10.3847/1538-4357/aa8df3",
language = "English",
volume = "849",
journal = "Astrophysical Journal",
issn = "0004-637X",
number = "1",
}