THE EVOLUTION OF INTERSTELLAR MEDIUM MASS PROBED BY DUST EMISSION: ALMA OBSERVATIONS AT z=0.3-2

N Scoville, H. Aussel, K Sheth, K S Scott, D Sanders, R. Ivison, A. Pope, P Capak, P Vanden Bout, S Manohar, J Kartaltepe, B Robertson, S Lilly

Research output: Contribution to journalArticlepeer-review

Abstract

The use of submillimeter dust continuum emission to probe the mass of interstellar dust and gas in galaxies is empirically calibrated using samples of local star-forming galaxies, Planck observations of the Milky Way, and high-redshift submillimeter galaxies. All of these objects suggest a similar calibration, strongly supporting the view that the Rayleigh-Jeans tail of the dust emission can be used as an accurate and very fast probe of the interstellar medium (ISM) in galaxies. We present ALMA Cycle 0 observations of the Band 7 (350 GHz) dust emission in 107 galaxies from z = 0.2 to 2.5. Three samples of galaxies with a total of 101 galaxies were stellar-mass-selected from COSMOS to have M * sime 1011 M ☉: 37 at z ~ 0.4, 33 at z ~ 0.9, and 31 at z = 2. A fourth sample with six infrared-luminous galaxies at z = 2 was observed for comparison with the purely mass-selected samples. From the fluxes detected in the stacked images for each sample, we find that the ISM content has decreased by a factor ~6 from 1 to 2 × 1010 M ☉ at both z = 2 and 0.9 down to ~2 × 109 M ☉ at z = 0.4. The infrared-luminous sample at z = 2 shows a further ~4 times increase in M ISM compared with the equivalent non-infrared-bright sample at the same redshift. The gas mass fractions are ~2% ± 0.5%, 12% ± 3%, 14% ± 2%, and 53% ± 3% for the four subsamples (z = 0.4, 0.9, and 2 and infrared-bright galaxies).
Original languageEnglish
Pages (from-to)1-13
Number of pages13
JournalAstrophysical Journal
Volume783
Issue number2
Early online date20 Feb 2014
DOIs
Publication statusPublished - 10 Mar 2014

Keywords

  • dust,extinction
  • evolution
  • galaxies: ISM
  • galaxies: starburst

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