Skip to content
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Galaxy counts at 24 μm in the swire fields
Astronomical Journal, Volume 135, No. 3, Year 2008
Notification
URL copied to clipboard!
Description
This paper presents galaxy source counts at 24 μm in the six Spitzer Wide-field InfraRed Extragalactic (SWIRE) fields. The source counts are compared to counts in other fields, and to model predictions that have been updated since the launch of Spitzer. This analysis confirms a very steep rise in the Euclidean-normalized differential number counts between 2 mJy and 0.3 mJy. Variations in the counts between fields show the effects of sample variance in the flux range of 0.5-10 mJy, up to 100% larger than Poisson errors. Nonetheless, a "shoulder" in the normalized counts persists at around 3 mJy. The peak of the normalized counts at 0.3 mJy is higher and narrower than most models predict. In the ELAIS N1 field, the 24 μm data are combined with Spitzer-IRAC data and five-band optical imaging, and these band-merged data are fit with photometric redshift templates. Above 1 mJy the counts are dominated by galaxies at z < 0.3. By 300 μJy, about 25% are between z 0.3 and 0.8, and a significant fraction are at z 1.3-2. At low redshifts the counts are dominated by spirals, and starbursts rise in number density to outnumber the spirals' contribution to the counts below 1 mJy. © 2008. The American Astronomical Society. All rights reserved.
Authors & Co-Authors
Shupe, David L.
United States, Pasadena
California Institute of Technology
Rowan-Robinson, Michael
United Kingdom, London
Imperial College London
Lonsdale, Carol J.
United States, La Jolla
University of California, San Diego
Masci, Frank J.
United States, Pasadena
California Institute of Technology
Oliver, Seb J.
United Kingdom, Brighton
University of Sussex
Vaccari, Mattia
United Kingdom, London
Imperial College London
Italy, Padua
Università Degli Studi Di Padova
Rodighiero, Giulia
Italy, Padua
Università Degli Studi Di Padova
Padgett, Deborah L.
United States, Pasadena
California Institute of Technology
Surace, Jason A.
United States, Pasadena
California Institute of Technology
Xu, Cong Kevin
Unknown Affiliation
Berta, Stefano
United States, La Jolla
University of California, San Diego
Italy, Padua
Università Degli Studi Di Padova
Pozzi, Francesca
Italy, Rome
Istituto Nazionale Di Astrofisica, Rome
Franceschini, Alberto
Italy, Padua
Università Degli Studi Di Padova
Gonzáles-Solares, Eduardo A.
United Kingdom, Cambridge
Institute of Astronomy
Siana, Brian D.
United States, Pasadena
California Institute of Technology
Farrah, Duncan G.
United States, Ithaca
Cornell University
Frayer, David T.
United States, Pasadena
California Institute of Technology
Polletta, Maria Del Carmen
United States, La Jolla
University of California, San Diego
France, Paris
Institut D’astrophysique de Paris
Owen, Frazer N.
United States, Socorro
National Radio Astronomy Observatory Socorro
Pérez-Fournon, Ismael
Spain, San Cristobal de la Laguna
Instituto Astrofisico de Canarias
Statistics
Citations: 44
Authors: 20
Affiliations: 11
Identifiers
Doi:
10.1088/0004-6256/135/3/1050
ISSN:
00046256