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

George H. Rieke, Maria Emilia De Rossi, Irene Shivaei, Volker Bromm, Jianwei Lyu

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish (US)
Pages (from-to)246-247
Number of pages2
JournalProceedings of the International Astronomical Union
StateAccepted/In press - 2020


  • evolution
  • galaxies: high-redshift
  • infrared: galaxies

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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