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  An ALMA [C II] Survey of 27 Quasars at z > 5.94

Decarli, R., Walter, F., Venemans, B. P., Bañados, E., Bertoldi, F., Carilli, C., et al. (2018). An ALMA [C II] Survey of 27 Quasars at z > 5.94. The Astrophysical Journal, 854.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0005-CE08-B Version Permalink: https://hdl.handle.net/21.11116/0000-0005-CE09-A
Genre: Journal Article

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https://ui.adsabs.harvard.edu/abs/2018ApJ...854...97D (Any fulltext)
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 Creators:
Decarli, Roberto1, Author
Walter, Fabian1, Author
Venemans, Bram P.1, Author
Bañados, Eduardo1, Author
Bertoldi, Frank1, Author
Carilli, Chris1, Author
Fan, Xiaohui1, Author
Farina, Emanuele Paolo1, Author
Mazzucchelli, Chiara1, Author
Riechers, Dominik1, Author
Rix, Hans-Walter1, Author
Strauss, Michael A.1, Author
Wang, Ran1, Author
Yang, Yujin1, Author
Affiliations:
1Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners, ou_2421692              

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Free keywords: galaxies: high-redshift galaxies: ISM quasars: emission lines quasars: general Astrophysics - Astrophysics of Galaxies Astrophysics - Cosmology and Nongalactic Astrophysics
 Abstract: We present a survey of the [C II] 158 μm line and underlying far- infrared (FIR) dust continuum emission in a sample of 27 z≳ 6 quasars using the Atacama Large Millimeter Array (ALMA) at ̃ 1\prime\prime resolution. The [C II] line was significantly detected (at > 5-σ) in 23 sources (85%). We find typical line luminosities of {L}[{{C}{{II}}]}={10}9-10 {L}☉ , and an average line width of ̃385 {km} {{{s}}}-1. 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 {M}☉ , 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× {10}8 {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.

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 Dates: 2018
 Publication Status: Issued
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Title: The Astrophysical Journal
Source Genre: Journal
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Pages: - Volume / Issue: 854 Sequence Number: - Start / End Page: - Identifier: -