dc.contributor.author
| ['Wilson, G.', 'Huang, J.-S.', 'Perez-Gonzalez, P. G.', 'Egami, E.', 'Ivison, R. J.', 'Rigby, J. R.', 'Alonso-Herrero, A.', 'Barmby, P.', 'Dole, H.', 'Fazio, G. G.', 'Le Floch, E.', 'Papovich, C.', 'Rigopoulou, D.', 'Bai, L', 'Engelbracht, C. W.', 'Frayer, D.', 'Gordon, K. D.', 'Hines, D. C.', 'Misselt, K. A.', 'Miyazaki, S.', 'Morrison, J. E.', 'Rieke, G. H.', 'Rieke, M. J.', 'Surace, J.'] |
dc.date.accessioned
| 2008-07-31T22:37:05Z |
dc.date.available
| 2008-07-31T22:37:05Z |
dc.date.issued
| 2004-09 |
dc.description.abstract
| We investigate extremely red objects (EROs) using near- and mid-infrared observations in five passbands (3.6 to 24 μm) obtained from the Spitzer Space Telescope, and deep ground-based R and K imaging. The great sensitivity of the Infrared Array Camera (IRAC) camera allows us to detect 64 EROs (a surface density of 2.90+/-0.36 arcmin-2 [3.6]AB<23.7) in only 12 minutes of IRAC exposure time, by means of an R-[3.6] color cut (analogous to the traditional red R-K cut). A pure infrared K-[3.6] red cut detects a somewhat different population and may be more effective at selecting z>1.3 EROs. We find ~17% of all galaxies detected by IRAC at 3.6 or 4.5 μm to be EROs. These percentages rise to about 40% at 5.8 μm, and about 60% at 8.0 μm. We utilize the spectral bump at 1.6 μm to divide the EROs into broad redshift slices using only near-infrared colors (2.2/3.6/4.5 μm). We conclude that two-thirds of all EROs lie at redshift z>1.3. Detections at 24 μm imply that at least 11% of 0.6<1.3 EROs and at least 22% of z>1.3 EROs are dusty star-forming galaxies. |
dc.identifier.citation
| The Astrophysical Journal Supplement Series, 154:107–111, 2004 September doi: 10.1086/422716 |
dc.identifier.clearanceno
| 04-1752 |
dc.identifier.uri
| http://hdl.handle.net/2014/40890 |
dc.language.iso
| en_US |
dc.publisher
| The American Astronomical Society |
dc.subject
| ['cosmology', 'galaxies', 'photometry', 'starburst'] |
dc.title
| Extremely red objects in the Lockman Hole |
dc.type
| Article |