Star formation and dust obscuration at z ≈ 2
Abstract
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.
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).Attached Files
Published - 1.3141544.pdf
Files
1.3141544.pdf
Additional details
Identifiers
- Eprint ID
- 66699
- Resolver ID
- CaltechAUTHORS:20160505-154751576
Funding
- NSF
- NASA
- HST-GO-09822
Dates
- Created
-
2016-05-09Created from EPrint's datestamp field
- Updated
-
2021-11-11Created from EPrint's last_modified field
Caltech Custom Metadata
- Caltech groups
- COSMOS
- Series Name
- AIP Conference Proceedings
- Series Volume or Issue Number
- 1111