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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 448291.0, MPI für Astronomie / Publikationen_mpia
The dust-unbiased cosmic star-formation history from the 20 CM Vla-Cosmos Survey
Authors:Smolcic, V.; Schinnerer, E.; Zamorani, G.; Bell, E. F.; Bondi, M.; Carilli, C. L.; Ciliegi, P.; Mobasher, B.; Paglione, T.; Scodeggio, M.; Scoville, N.
Date of Publication (YYYY-MM-DD):2009
Title of Journal:The Astrophysical Journal
Journal Abbrev.:ApJ
Start Page:610
End Page:618
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:We derive the cosmic star-formation history out to z = 1.3 using a sample of ~350 radio-selected star-forming (SF) galaxies, a far larger sample than those in previous, similar studies. We attempt to differentiate between radio emission from active galactic nuclei and SF galaxies, and determine an evolving 1.4 GHz luminosity function (LF) based on these VLA-COSMOS SF galaxies. We precisely measure the high-luminosity end of the SF galaxy LF (star-formation rate gsim100 M sun yr--1 equivalent to ultra-luminous IR galaxies) out to z = 1.3, finding a somewhat slower evolution than that previously derived from mid-infrared data. We find that more stars are forming in luminous starbursts at high redshift. We use extrapolations based on the local radio galaxy LF; assuming pure luminosity evolution, we derive L * vprop (1 + z)2.1±0.2 or L * vprop (1 + z)2.5±0.1, depending on the choice of the local radio galaxy LF. Thus, our radio-derived results independently confirm the ~1 order of magnitude decline in the CSFH since z ~ 1. Based on observations with the National Radio Astronomy Observatory which is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc.
Free Keywords:cosmology: observations; galaxies: evolution; galaxies: fundamental parameters; galaxies: starburst; radio continuum: galaxies
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://adsabs.harvard.edu/abs/2009ApJ...690..610S [ID No:1]
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