@article{912916d2671841c89a580d21290dddfd,
title = "Detections of [O III] 88 μm in two quasars in the reionization epoch",
abstract = "We report on detections with the Atacama Large Millimeter/sub-millimeter Array of the far-infrared [O III] 88 μm line and the underlying dust continuum in two quasars in the reionization epoch, J205406.48–000514.8 (hereafter J2054–0005) at z = 6.0391 ± 0.0002 and J231038.88+185519.7 (hereafter J2310+1855) at z = 6.0035 ± 0.0007. The [O III] luminosities of J2054–0005 and J2310+1855 are L[O III] = (6.8 ± 0.6) × 109 and (2.4 ± 0.6) × 109 L⊙, corresponding to ∼0.05% and 0.01% of the total infrared luminosity, LTIR, respectively. Combining these [O III] luminosities with [C II] 158 μm luminosities in the literature, we find that J2054–0005 and J2310+1855 have [O III]-to-[C II] luminosity ratios of 2.1 ± 0.4 and 0.3 ± 0.1, respectively, the latter of which is the lowest among objects so far reported at z > 6. Combining [O III] observations at z ≈ 6–9 from our study and the literature, we identify the [O III] line deficit: objects with a larger LTIR (total infrared luminosity) have lower L[O III]-to-LTIR ratios. Furthermore, we also find that the anti-correlation is shifted toward a higher LTIR value when compared with the local [O III] line deficit.",
keywords = "Galaxies: ISM, Galaxies: active, Galaxies: high-redshift, Quasars: general",
author = "Takuya Hashimoto and Inoue, {Akio K.} and Yoichi Tamura and Hiroshi Matsuo and Ken Mawatari and Yuki Yamaguchi",
note = "Funding Information: T.H. and A.K.I. appreciate support from NAOJ ALMA Scientific Research Grant Number 2016-01A. We are also grateful to KAKENHI grants 26287034 and 17H01114 (K.M. and A.K.I.), and 17H06130 (Y.T.). This work was partly supported by a Grant-in-Aid for Scientific Research 19J01620 (T.H.). 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/. SDSS-III is managed by the Astrophysical Research Consortium for the Participating Institutions of the SDSS-III Collaboration including the University of Arizona, the Brazilian Participation Group, Brookhaven National Laboratory, Carnegie Mellon University, University of Florida, the French Participation Group, the German Participation Group, Harvard University, the Instituto de Astrofisica de Canarias, the Michigan State/Notre Dame/JINA Participation Group, Johns Hopkins University, Lawrence Berkeley National Laboratory, Max Planck Institute for Astrophysics, Max Planck Institute for Extraterrestrial Physics, New Mexico State University, New York University, Ohio State University, Pennsylvania State University, University of Portsmouth, Princeton University, the Spanish Participation Group, the University of Tokyo, University of Utah, Vanderbilt University, University of Virginia, University of Washington, and Yale University. Publisher Copyright: {\textcopyright} The Author(s) 2019. Published by Oxford University Press on behalf of the Astronomical Society of Japan. All rights reserved.",
year = "2019",
month = dec,
day = "1",
doi = "10.1093/pasj/psz094",
language = "English",
volume = "71",
journal = "Publication of the Astronomical Society of Japan",
issn = "0004-6264",
publisher = "Astronomical Society of Japan",
number = "6",
}