Sign on

SAO/NASA ADS Astronomy Abstract Service


· Find Similar Abstracts (with default settings below)
· Electronic Refereed Journal Article (HTML)
· Full Refereed Journal Article (PDF/Postscript)
· arXiv e-print (arXiv:0711.2026)
· References in the article
· Citations to the Article (18) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (10)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
Galaxy Counts at 24 μm in the SWIRE Fields
Authors:
Shupe, David L.; Rowan-Robinson, Michael; Lonsdale, Carol J.; Masci, Frank; Evans, Tracey; Fang, Fan; Oliver, Sebastian; Vaccari, Mattia; Rodighiero, Giulia; Padgett, Deborah; Surace, Jason A.; Xu, C. Kevin; Berta, Stefano; Pozzi, Francesca; Franceschini, Alberto; Babbedge, Thomas; Gonzales-Solares, Eduardo; Siana, Brian D.; Farrah, Duncan; Frayer, David T.; Smith, H. E.; Polletta, Maria; Owen, Frazer; Pérez-Fournon, Ismael
Affiliation:
AA(Spitzer Science Center, California Institute of Technology, 314-6, Pasadena, CA 91125, USA ; Infrared Processing and Analysis Center, California Institute of Technology, 100-22, Pasadena, CA 91125, USA ), AB(Astrophysics Group, Blackett Laboratory, Imperial College London, Prince Consort Road, London SW7 2BW, UK ), AC(Infrared Processing and Analysis Center, California Institute of Technology, 100-22, Pasadena, CA 91125, USA ; Center for Astrophysics and Space Sciences, University of California, San Diego, La Jolla, CA 92093-0424, USA ), AD(Spitzer Science Center, California Institute of Technology, 314-6, Pasadena, CA 91125, USA ; Infrared Processing and Analysis Center, California Institute of Technology, 100-22, Pasadena, CA 91125, USA ), AE(Infrared Processing and Analysis Center, California Institute of Technology, 100-22, Pasadena, CA 91125, USA ), AF(Spitzer Science Center, California Institute of Technology, 314-6, Pasadena, CA 91125, USA ; Infrared Processing and Analysis Center, California Institute of Technology, 100-22, Pasadena, CA 91125, USA ), AG(Astronomy Centre, Department of Physics & Astronomy, University of Sussex, Brighton BN1 9QH, UK ), AH(Astrophysics Group, Blackett Laboratory, Imperial College London, Prince Consort Road, London SW7 2BW, UK ; Dipartimento di Astronomia, Universita di Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy ), AI(Dipartimento di Astronomia, Universita di Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy ), AJ(Spitzer Science Center, California Institute of Technology, 314-6, Pasadena, CA 91125, USA ), AK(Spitzer Science Center, California Institute of Technology, 314-6, Pasadena, CA 91125, USA ; Infrared Processing and Analysis Center, California Institute of Technology, 100-22, Pasadena, CA 91125, USA ), AL(Infrared Processing and Analysis Center, California Institute of Technology, 100-22, Pasadena, CA 91125, USA ), AM(Center for Astrophysics and Space Sciences, University of California, San Diego, La Jolla, CA 92093-0424, USA ; Dipartimento di Astronomia, Universita di Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy ), AN(Istituto Nazionale di Astrofisica, Osservatorio Astronomico di Bologna, via Ranzani 1, I-40127 Bologna, Italy ), AO(Dipartimento di Astronomia, Universita di Padova, Vicolo Osservatorio 5, I-35122 Padua, Italy ), AP(Astrophysics Group, Blackett Laboratory, Imperial College London, Prince Consort Road, London SW7 2BW, UK ), AQ(Institute of Astronomy, Madingley Road, Cambridge CB3 0HA, UK ), AR(Spitzer Science Center, California Institute of Technology, 314-6, Pasadena, CA 91125, USA ), AS(Department of Astronomy, Cornell University, Space Sciences Building, Ithaca, NY 14853, USA ), AT(Spitzer Science Center, California Institute of Technology, 314-6, Pasadena, CA 91125, USA ; Infrared Processing and Analysis Center, California Institute of Technology, 100-22, Pasadena, CA 91125, USA ), AU(Center for Astrophysics and Space Sciences, University of California, San Diego, La Jolla, CA 92093-0424, USA ), AV(Center for Astrophysics and Space Sciences, University of California, San Diego, La Jolla, CA 92093-0424, USA ; Institut d'Astrophysique de Paris, 98bis, bd Arago-75014 Paris, France ), AW(National Radio Astronomy Observatory, Socorro, NM 87801, USA ), AX(Instituto Astrofiscia de Canarias, Via Lactea, 38200 La Laguna, S/C de Tenerife, Spain)
Publication:
The Astronomical Journal, Volume 135, Issue 3, pp. 1050-1056 (2008). (AJ Homepage)
Publication Date:
03/2008
Origin:
IOP
DOI:
10.1088/0004-6256/135/3/1050
Bibliographic Code:
2008AJ....135.1050S

Abstract

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.
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)

   

Find Similar Abstracts:

Use: Authors
Title
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints