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  Dust Emission in an Accretion-rate-limited Sample of z ≳ 6 Quasars

Venemans, B. P., Decarli, R., Walter, F., Bañados, E., Bertoldi, F., Fan, X., et al. (2018). Dust Emission in an Accretion-rate-limited Sample of z ≳ 6 Quasars. The Astrophysical Journal, 866.

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Datensatz-Permalink: https://hdl.handle.net/21.11116/0000-0005-CA76-3 Versions-Permalink: https://hdl.handle.net/21.11116/0000-0005-CA77-2
Genre: Zeitschriftenartikel

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externe Referenz:
https://ui.adsabs.harvard.edu/abs/2018ApJ...866..159V (beliebiger Volltext)
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 Urheber:
Venemans, Bram P.1, Autor
Decarli, Roberto1, Autor
Walter, Fabian1, Autor
Bañados, Eduardo1, Autor
Bertoldi, Frank1, Autor
Fan, Xiaohui1, Autor
Farina, Emanuele Paolo1, Autor
Mazzucchelli, Chiara1, Autor
Riechers, Dominik1, Autor
Rix, Hans-Walter1, Autor
Wang, Ran1, Autor
Yang, Yujin1, Autor
Affiliations:
1Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners, ou_2421692              

Inhalt

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Schlagwörter: galaxies: high-redshift galaxies: star formation galaxies: statistics quasars: general Astrophysics - Astrophysics of Galaxies Astrophysics - Cosmology and Nongalactic Astrophysics
 Zusammenfassung: We present Atacama Large Millimeter Array 1 mm observations of the rest- frame far-infrared (FIR) dust continuum in 27 quasars at redshifts 6.0 ≲ z < 6.7. We detect FIR emission at ≳3σ in all quasar host galaxies with flux densities at ̃1900 GHz in the rest-frame of 0.12 < S rest,1900 GHz < 5.9 mJy, with a median (mean) flux density of 0.88 mJy (1.59 mJy). The implied FIR luminosities range from {L}FIR} = (0.27-13) × 1012 {L}☉ , with 74% of our quasar hosts having {L}FIR} > 1012 {L}☉ . The estimated dust masses are {M}dust} = 107-109 {M}☉ . If the dust is heated only by star formation, then the star formation rates in the quasar host galaxies are between 50 and 2700 {M}☉ {yr}}-1. In the framework of the host galaxy-black hole coevolution model a correlation between ongoing black hole growth and star formation in the quasar host galaxy would be expected. However, combined with results from the literature to create a luminosity-limited quasar sample, we do not find a strong correlation between quasar UV luminosity (a proxy for ongoing black hole growth) and FIR luminosity (star formation in the host galaxy). The absence of such a correlation in our data does not necessarily rule out the coevolution model, and could be due to a variety of effects (including different timescales for black hole accretion and FIR emission).

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 Datum: 2018
 Publikationsstatus: Erschienen
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Titel: The Astrophysical Journal
Genre der Quelle: Zeitschrift
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Seiten: - Band / Heft: 866 Artikelnummer: - Start- / Endseite: - Identifikator: -