TY - JOUR
T1 - An ALMA [C II] Survey of 27 Quasars at z > 5.94
AU - Decarli, Roberto
AU - Walter, Fabian
AU - Venemans, Bram P.
AU - Bañados, Eduardo
AU - Bertoldi, Frank
AU - Carilli, Chris
AU - Fan, Xiaohui
AU - Farina, Emanuele Paolo
AU - Mazzucchelli, Chiara
AU - Riechers, Dominik
AU - Rix, Hans Walter
AU - Strauss, Michael A.
AU - Wang, Ran
AU - Yang, Yujin
N1 - Funding Information:
Acknowledge support through ERC grant Cosmic-Dawn. D.R. acknowledges support from the National Science Foundation under grant number AST-1614213 to Cornell University.
Publisher Copyright:
© 2018. The American Astronomical Society. All rights reserved..
PY - 2018/2/20
Y1 - 2018/2/20
N2 - We present a survey of the [C ii] 158 μm line and underlying far-infrared (FIR) dust continuum emission in a sample of 27 quasars using the Atacama Large Millimeter Array (ALMA) at resolution. The [C ii] line was significantly detected (at -σ) in 23 sources (85%). We find typical line luminosities of L[C II]= 109-10 L⊙, and an average line width of ∼385 . The [C ii]-to-far-infrared luminosity ratios ([C ii]/FIR) in our sources span one order of magnitude, highlighting a variety of conditions in the star-forming medium. Four quasar host galaxies are clearly resolved in their [C ii] emission on a few kpc scales. Basic estimates of the dynamical masses of the host galaxies give masses between 2 ×1010 and 2 ×1011 , i.e., more than an order of magnitude below what is expected from local scaling relations, given the available limits on the masses of the central black holes (>3 × 108 M⊙, assuming Eddington-limited accretion). In stacked ALMA [C ii] spectra of individual sources in our sample, we find no evidence of a deviation from a single Gaussian profile. The quasar luminosity does not strongly correlate with either the [C ii] luminosity or equivalent width. This survey (with typical on-source integration times of 8 minutes) showcases the unparalleled sensitivity of ALMA at millimeter wavelengths, and offers a unique reference sample for the study of the first massive galaxies in the universe.
AB - We present a survey of the [C ii] 158 μm line and underlying far-infrared (FIR) dust continuum emission in a sample of 27 quasars using the Atacama Large Millimeter Array (ALMA) at resolution. The [C ii] line was significantly detected (at -σ) in 23 sources (85%). We find typical line luminosities of L[C II]= 109-10 L⊙, and an average line width of ∼385 . The [C ii]-to-far-infrared luminosity ratios ([C ii]/FIR) in our sources span one order of magnitude, highlighting a variety of conditions in the star-forming medium. Four quasar host galaxies are clearly resolved in their [C ii] emission on a few kpc scales. Basic estimates of the dynamical masses of the host galaxies give masses between 2 ×1010 and 2 ×1011 , i.e., more than an order of magnitude below what is expected from local scaling relations, given the available limits on the masses of the central black holes (>3 × 108 M⊙, assuming Eddington-limited accretion). In stacked ALMA [C ii] spectra of individual sources in our sample, we find no evidence of a deviation from a single Gaussian profile. The quasar luminosity does not strongly correlate with either the [C ii] luminosity or equivalent width. This survey (with typical on-source integration times of 8 minutes) showcases the unparalleled sensitivity of ALMA at millimeter wavelengths, and offers a unique reference sample for the study of the first massive galaxies in the universe.
KW - galaxies: ISM
KW - galaxies: high-redshift
KW - quasars: emission lines
KW - quasars: general
UR - https://www.scopus.com/pages/publications/85042693377
UR - https://www.scopus.com/pages/publications/85042693377#tab=citedBy
U2 - 10.3847/1538-4357/aaa5aa
DO - 10.3847/1538-4357/aaa5aa
M3 - Article
AN - SCOPUS:85042693377
SN - 0004-637X
VL - 854
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 2
M1 - 97
ER -