Ivison, R. J. and Chapman, S. C. and Faber, S. M. and Smail, Ian and Biggs, A. D. and Conselice, C. J. and Wilson, G. and Salim, S. and Huang, J.-S. and Willner, S. P. (2007) AEGIS20: A radio survey of the Extended Groth Strip. Astrophysical Journal Letters, 660 (1). L77-L80. ISSN 2041-8205. doi:10.1086/517917. https://resolver.caltech.edu/CaltechAUTHORS:IVIapjl07
![]()
|
PDF
- Published Version
See Usage Policy. 144kB |
Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:IVIapjl07
Abstract
We describe AEGIS20-a radio survey of the Extended Groth Strip (EGS) conducted with the Very Large Array (VLA) at 1.4 GHz. The resulting catalog contains 1123 emitters and is sensitive to ultraluminous (10^12 L⊙) starbursts to z ≤ 1.3, well matched to the redshift range of the DEEP2 spectroscopic survey in this region. We use stacking techniques to explore the microjansky-level emission from a variety of galaxy populations selected via conventional criteria-Lyman break galaxies (LBGs), distant red galaxies (DRGs), UV-selected galaxies, and extremely red objects (EROs)-determining their properties as a function of color, magnitude, and redshift and their extinction-free contributions to the history of star formation. We confirm the familiar pattern that the star formation rate (SFR) density, ρ_*, increases by at least a factor of ~5 from z = 0 to 1, although we note highly discrepant UV- and radio-based SFR estimates. Our radio-based SFRs become more difficult to interpret at z > 1 where correcting for contamination by radio-loud active galactic nuclei (AGNs) comes at the price of rejecting luminous starbursts. While stacking radio images is a useful technique, accurate radio-based SFRs for z » 1 galaxies require precise redshifts and extraordinarily high fidelity radio data to identify and remove accretion-related emission.
Item Type: | Article | ||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Related URLs: |
| ||||||||||||||||||
ORCID: |
| ||||||||||||||||||
Additional Information: | © 2007 The American Astronomical Society. Received 2006 May 14; accepted 2006 October 2; published 2007 April 5. | ||||||||||||||||||
Subject Keywords: | cosmology: observations; galaxies: evolution; galaxies: formation | ||||||||||||||||||
Issue or Number: | 1 | ||||||||||||||||||
DOI: | 10.1086/517917 | ||||||||||||||||||
Record Number: | CaltechAUTHORS:IVIapjl07 | ||||||||||||||||||
Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:IVIapjl07 | ||||||||||||||||||
Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||||||||||
ID Code: | 13426 | ||||||||||||||||||
Collection: | CaltechAUTHORS | ||||||||||||||||||
Deposited By: | Tony Diaz | ||||||||||||||||||
Deposited On: | 01 Jun 2009 17:06 | ||||||||||||||||||
Last Modified: | 08 Nov 2021 22:37 |
Repository Staff Only: item control page