1. First Insights into the SWIRE Galaxy Populations
- Author
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Lonsdale, Carol, Polletta, Maria, Surace, Jason, Shupe, David, 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, Dole, Herve, Stacey, Gordon, Sergeant, Steve, Pierre, Marguerite, Griffin, Matt, and Puetter, Rick
- Subjects
Astrophysics - Abstract
We characterize the SWIRE galaxy populations in the SWIRE validation field within the Lockman Hole, based on the 3.6-24$\mu$ Spitzer data and deep U,g',r',r' optical imaging within an area ~1/3 sq. deg for ~16,000 Spitzer-SWIRE sources. The entire SWIRE survey will discover over 2.3 million galaxies at 3.6$\mu$m and almost 350,000 at 24$\mu$m; ~70,000 of these will be 5-band 3.6-24$\mu$ 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]$\mu$m color are found, as well as many objects very red in the 3.6-24$\mu$m mid-IR. Nine of these are investigated and are interpreted as star-forming systems, starbursts and AGN from z=0.37 to 2.8, with luminosities from L$_{IR}$=10$^{10.3}$ to 10$^{13.7}$ L$_{\odot}$, Comment: Accepted for publication in the ApJ Supplements Spitzer Special Issue 17 pages, 4 figures
- Published
- 2004
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