First Insights into the SpitzerWide-Area Infrared Extragalactic Legacy Survey (SWIRE) Galaxy Populations

Lonsdale, Carol, Polletta, Maria del Carmen, Surace, Jason, Shupe, Dave, Fang, Fan, Xu, C. Kevin, Smith, Harding E., Siana, Brian, Rowan-Robinson, Michael, Babbedge, Tom, Oliver, Seb, Pozzi, Francesca, Davoodi, Payam, Owen, Frazer, Padgett, Deborah, Frayer, Dave, Jarrett, Tom, Masci, Frank, O'Linger, JoAnne, Conrow, Tim, Farrah, Duncan, Morrison, Glenn, Gautier, Nick, Franceschini, Alberto, Berta, Stefano, Perez-Fournon, Ismael, Hatziminaoglou, Evanthia, Afonso-Luis, Alejandro, Dole, Herve, Stacey, Gordon, Serjeant, Steve, Pierre, Marguerite, Griffin, Matthew ORCID: https://orcid.org/0000-0002-0033-177X and Puetter, Rick 2004. First Insights into the SpitzerWide-Area Infrared Extragalactic Legacy Survey (SWIRE) Galaxy Populations. The Astrophysical Journal Supplement Series 154 (1) , pp. 54-59. 10.1086/423206

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Abstract

We characterize the Spitzer Wide-area Infrared Extragalactic Legacy Survey (SWIRE) galaxy populations in the SWIRE validation field within the Lockman Hole, based on the 3.6-24 μm Spitzer data and deep U, g', r', i' optical imaging within an area ~1/3 deg2 for ~16,000 Spitzer SWIRE sources. The entire SWIRE survey will discover over 2.3 million galaxies at 3.6 μm and almost 350,000 at 24 μm; ~70,000 of these will be five-band 3.6-24 μm detections. The colors cover a broad range, generally well represented by redshifted spectral energy distributions of known galaxy populations; however, significant samples of unusually blue objects in the [3.6]-[4.5] color are found, as well as many objects very red in the 3.6-24 μm mid-IR. Nine of these are investigated and are interpreted as star-forming systems, starbursts, and active galactic nuclei (AGNs) from z = 0.37 to 2.8, with luminosities from LIR = 1010.3 to 1013.7 L.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Schools > Physics and Astronomy
Subjects:	Q Science > QB Astronomy Q Science > QC Physics
Uncontrolled Keywords:	galaxies: evolution; infrared: galaxies
Additional Information:	Pdf uploaded in accordance with publisher's policy at http://www.sherpa.ac.uk/romeo/issn/0067-0049/ (accessed 24/04/2014).
Publisher:	The American Astronomical Society
ISSN:	0067-0049
Date of First Compliant Deposit:	30 March 2016
Last Modified:	02 May 2023 16:15
URI:	https://orca.cardiff.ac.uk/id/eprint/7393

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