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Dust mass and dust production efficiencies on the redshift frontier

Published online by Cambridge University Press:  10 June 2020

Hiroyuki Hirashita ,
Denis Burgarella  and
Rychard J. Bouwens
Hiroyuki Hirashita
Affiliation:
Institute of Astronomy and Astrophysics, Academia Sinica, Astronomy-Mathematics Building, AS/NTU No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan email: hirashita@asiaa.sinica.edu.tw
Denis Burgarella
Affiliation:
Aix-Marseille Université, CNRS, LAM, UMR 7326, 13388 Marseille, France
Rychard J. Bouwens
Affiliation:
Leiden Observatory, Leiden University, NL-2300 RA Leiden, Netherlands
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Abstract

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In order to clarify the dust production in the early Universe, we constrain the dust mass in high-redshift (z ≳ 5) galaxies using the upper limits obtained by ALMA. We perform fitting to the rest-frame UV–far-infrared spectral energy distribution (SED) of a giant Lyα emitter, Himiko, at z = 6.6 and a composite SED of z > 5 Lyman break galaxies (LBGs). For Himiko, we obtain a high dust temperature > 70 K. This high dust temperature puts a strong upper limit on the total dust mass Md ≲ 2 × 106 M⊙, and the dust mass produced per supernova (SN) md,SN ≲ 0.1 M⊙. Such a low md,SN suggests significant loss of dust by reverse shock destruction or outflow. For the LBG sample, we only obtain an upper limit for md,SN as ∼2 M⊙. This clarifies the importance of observing UV-bright objects (like Himiko) to constrain the dust production by SNe.

Keywords

dustdust extinctiongalaxy evolutionhigh redshiftISMfar infrared
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S341: Challenges in Panchromatic Modelling with Next Generation Facilities , November 2019 , pp. 216 - 220
Copyright
© International Astronomical Union 2020

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