Pannella, M. and Carilli, C. L. and Daddi, E. and McCracken, H. J. and Owen, F. and Renzini, A. and Schinnerer, E. and Smolčić, V. (2009) Star formation and dust obscuration at z ≈ 2. In: Probing Stellar Populations Out to the Distant Universe. AIP Conference Proceedings. No.1111. American Institute of Physics , Melville, NY, pp. 203-206. ISBN 978-0-7354-0648-3 http://resolver.caltech.edu/CaltechAUTHORS:20160505-154751576
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We present preliminary results of a study aimed to constrain the star formation rate and dust content of galaxies as a function of mass at z≈ 2,, a crucial time for galaxy evolution: this is the cosmic epoch when most of the stars in the Universe are formed. We use a sample of star forming galaxies to perform a stacking analysis of their 1.4 GHz radio continuum as a function of different stellar population properties. Dust unbiased star formation rates are retrieved from radio fluxes. The main results of this work are: i) Galaxies in our sample show no downsizing pattern: specific star formation rates are constant over more than 1 dex in mass and up to the highest stellar mass probed; ii) a model independent UV dust attenuation law is provided which can be used to retrieve UV corrected SFR for extensive samples and hence a dust free cosmic star formation rate density.
|Item Type:||Book Section|
|Additional Information:||© 2009 American Institute of Physics. Published online 03 May 2009. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. The HST COSMOS Treasury program was supported through NASA grant HST-GO-09822. We gratefully acknowledge the contributions of the entire COSMOS collaboration consisting of more than 100 scientists (http://www.astro.caltech.edu/cosmos).|
|Subject Keywords:||galaxies: formation and evolution - galaxies: star formation - galaxies: dust attenuation|
|Classification Code:||PACS: 98.62.Ai, 98.62.Ck, 98.62.Lv, 98.62.Qz|
|Official Citation:||Star formation and dust obscuration at z≈2 Pannella, M. and Carilli, C. L. and Daddi, E. and Mc Cracken, H. J. and Owen, F. and Renzini, A. and Schinnerer, E. and Smolčić, V., AIP Conference Proceedings, 1111, 203-206 (2009), DOI:http://dx.doi.org/10.1063/1.3141544|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||George Porter|
|Deposited On:||09 May 2016 17:45|
|Last Modified:||09 May 2016 17:45|
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