ePubs
The open archive for STFC research publications
Home
About ePubs
Content Policies
News
Help
Privacy/Cookies
Suggest an Enhancement
Contact ePubs
Full Record Details
Persistent URL
http://purl.org/net/epubs/work/10918069
Record Status
Checked
Record Id
10918069
Title
MULTI-WAVELENGTH STUDY OF A COMPLETE IRAC 3.6 ?m SELECTED GALAXY SAMPLE: A FAIR CENSUS OF RED AND BLUE POPULATIONS AT REDSHIFTS 0.4-1.2
Contributors
J Huang
,
M Ashby
,
T Wang
,
S Willner
,
G Fazio
,
S Faber
,
D Koo
,
C Willmer
,
B Weiner
,
D Rigopoulou (STFC Rutherford Appleton Lab.)
,
G Magdis
,
J Newman
,
C Shu
,
Z Luo
,
P Barmby
,
A Coil
,
X Zheng
Abstract
We present a multi-wavelength study of a 3.6 ?m selected galaxy sample in the Extended Groth Strip (EGS). The sample is complete for galaxies with stellar mass >10 M and redshift 0.4 < z < 1.2. In this redshift range, the Infrared Array Camera 3.6 ?m band measures the rest-frame near-infrared band, permitting nearly unbiased selection with respect to both quiescent and star-forming galaxies. The numerous spectroscopic redshifts available in the EGS are used to train an artificial neural network to estimate photometric redshifts. The distribution of photometric redshift errors is Gaussian with standard deviation ?0.025(1 + z), and the fraction of redshift failures (>3? errors) is about 3.5%. A new method of validation based on pair statistics confirms the estimate of standard deviation even for galaxies lacking spectroscopic redshifts. Basic galaxy properties measured include rest-frame U-B colors, B- and K-band absolute magnitudes, and stellar masses. We divide the sample into quiescent and star-forming galaxies according to their rest-frame U-B colors and 24-3.6 ?m flux density ratios and derive rest K-band luminosity functions and stellar mass functions for quiescent, star-forming, and all galaxies. The results show that massive, quiescent galaxies were in place by z ? 1, but lower mass galaxies generally ceased their star formation at later epochs. © 2013. The American Astronomical Society. All rights reserved..
Organisation
STFC
,
RALSP
,
RALSP - SPD
Keywords
Funding Information
Related Research Object(s):
Licence Information:
Language
English (EN)
Type
Details
URI(s)
Local file(s)
Year
Journal Article
Astrophys J
766, no. 1 (2013): 21.
doi:10.1088/0004-637X/766/1/21
2013
Showing record 1 of 1
Recent Additions
Browse Organisations
Browse Journals/Series
Login to add & manage publications and access information for OA publishing
Username:
Password:
Useful Links
Chadwick & RAL Libraries
SHERPA FACT
SHERPA RoMEO
SHERPA JULIET
Journal Checker Tool
Google Scholar