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The Far-Infrared emission of the first (z ∼ 6) massive galaxies

Published online by Cambridge University Press:  04 June 2020

George H. Rieke
Affiliation:
Steward Observatory, 533 N. Cherry Ave., The University of Arizona, Tucson, AZ85721, USA email: grieke@as.arizona.edu
Maria Emilia De Rossi
Affiliation:
Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales y Ciclo Básico Común. Buenos Aires, Argentina and CONICET-Universidad de Buenos Aires, Instituto de Astronoma y Fsica del Espacio (IAFE). Buenos Aires, Argentina
Irene Shivaei
Affiliation:
Steward Observatory, 533 N. Cherry Ave., The University of Arizona, Tucson, AZ85721, USA email: grieke@as.arizona.edu
Volker Bromm
Affiliation:
Department of Astronomy, The University of Texas, 2515 Speedway, Stop C1400, Austin, Texas78712-1205, USA
Jianwei Lyu
Affiliation:
Steward Observatory, 533 N. Cherry Ave., The University of Arizona, Tucson, AZ85721, USA email: grieke@as.arizona.edu
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Abstract

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The first massive galaxies (z ∼ 6) have (1) very high energy density due to their small diameters and extreme luminosities in young stars and (2) interstellar dust relatively deficient in carbon compared with silicates. Both of these attributes should raise their interstellar dust temperatures compared with lower redshift galaxies. Not only is this temperature trend observed, but the high-z spectral energy distributions (SEDs) are very broad due to very warm dust. As a result total infrared luminosities – and star formation rates – at the highest redshifts estimated by fitting blackbodies to submm- and mm-wave observations can be low by a factor of ∼2.

Type
Contributed Papers
Copyright
© International Astronomical Union 2020

References

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