The Evolving Interstellar Medium of Star Forming Galaxies Since z=2 as Probed by Their Infrared Spectral Energy Distributions

Journal article

Using data from the mid-infrared to millimeter wavelengths for individual galaxies and for stacked ensembles at 0.5, which is proportional to the dust mass weighted luminosity (LIR/Mdust), and the primary parameter defining the shape of the SED, is equivalent to SFE/Z. For MS galaxies we measure this quantity, , showing that it does not depend significantly on either the stellar mass or the sSFR. This is explained as a simple consequence of the existing correlations between SFR-M*, M*-Z and Mgas-SFR. Instead, we show that (or LIR/Mdust) does evolve, with MS galaxies having harder radiation fields and thus warmer temperatures as redshift increases from z=0 to 2, a trend which can also be understood based on the redshift evolution of the M*-Z and SFR-M* relations. These results motivate the construction of a universal set of SED templates for MS galaxies which vary as a function of redshift with only one parameter, .

Authors: Magdis, G; Daddi, E; Bethermin, M; Sargent, M; Elbaz, D

• Publication status: Published
• Journal: ASTROPHYSICAL JOURNAL
• Volume: 760
• Issue: 1
• Pages: 6-6
• Publication date: 2012-10-03
• DOI: 10.1088/0004-637X/760/1/6
• EISSN: 1538-4357
• ISSN: 0004-637X
• Keywords: astro-ph.CO