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Journal Article

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

MPS-Authors

Venemans,  Bram P.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Decarli,  Roberto
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Walter,  Fabian
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Bañados,  Eduardo
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Bertoldi,  Frank
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Fan,  Xiaohui
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Farina,  Emanuele Paolo
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Mazzucchelli,  Chiara
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Riechers,  Dominik
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Rix,  Hans-Walter
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Wang,  Ran
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Yang,  Yujin
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

External Resource

https://ui.adsabs.harvard.edu/abs/2018ApJ...866..159V
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Citation

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.


Cite as: https://hdl.handle.net/21.11116/0000-0005-CA76-3
Abstract
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).