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GAS FRACTION AND DEPLETION TIME OF MASSIVE STAR-FORMING GALAXIES AT z similar to 3.2: NO CHANGE IN GLOBAL STAR FORMATION PROCESS OUT TO z > 3

Schinnerer, E.; Groves, Brent Allan; Sargent, M. T.; Karim, A; Oesch, P. A.; Magnelli, B; LeFevre, O.; Tasca, L.; Civano, F.; Cassata, P.; Smolcic, Vernesa

Description

The observed evolution of the gas fraction and its associated depletion time in main-sequence (MS) galaxies provides insights on how star formation proceeds over cosmic time. We report ALMA detections of the rest-frame ∼300 μm continuum observed at 240 GHz for 45 massive (álog 10.7 ( ( )) M M  ñ = ), normal star-forming (álog sSFR yr 8.6 ( ( )) -1 ñ=- ), i.e., MS, galaxies at z » 3.2 in the COSMOS field. From an empirical calibration between cold neutral, i.e., molecular and atomic, gas mass...[Show more]

CollectionsANU Research Publications
Date published: 2016
Type: Journal article
URI: http://hdl.handle.net/1885/152167
Source: The Astrophysical Journal
DOI: 10.3847/1538-4357/833/1/112
Access Rights: Open Access

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