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Star formation and dust obscuration at z ≈ 2

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.

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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
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McCracken, H. J.0000-0002-9489-7765
Schinnerer, E.0000-0002-3933-7677
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 (
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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
Record Number:CaltechAUTHORS:20160505-154751576
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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:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:66699
Deposited By: George Porter
Deposited On:09 May 2016 17:45
Last Modified:18 May 2017 22:48

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