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Extremely red objects in the Lockman Hole

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dc.contributor.author Wilson, G.
dc.contributor.author Huang, J.-S.
dc.contributor.author Perez-Gonzalez, P. G.
dc.contributor.author Egami, E.
dc.contributor.author Ivison, R. J.
dc.contributor.author Rigby, J. R.
dc.contributor.author Alonso-Herrero, A.
dc.contributor.author Barmby, P.
dc.contributor.author Dole, H.
dc.contributor.author Fazio, G. G.
dc.contributor.author Le Floch, E.
dc.contributor.author Papovich, C.
dc.contributor.author Rigopoulou, D.
dc.contributor.author Bai, L
dc.contributor.author Engelbracht, C. W.
dc.contributor.author Frayer, D.
dc.contributor.author Gordon, K. D.
dc.contributor.author Hines, D. C.
dc.contributor.author Misselt, K. A.
dc.contributor.author Miyazaki, S.
dc.contributor.author Morrison, J. E.
dc.contributor.author Rieke, G. H.
dc.contributor.author Rieke, M. J.
dc.contributor.author Surace, J.
dc.date.accessioned 2008-07-31T22:37:05Z
dc.date.available 2008-07-31T22:37:05Z
dc.date.issued 2004-09
dc.identifier.citation The Astrophysical Journal Supplement Series, 154:107–111, 2004 September doi: 10.1086/422716 en_US
dc.identifier.clearanceno 04-1752
dc.identifier.uri http://hdl.handle.net/2014/40890
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<z<1.3 EROs and at least 22% of z>1.3 EROs are dusty star-forming galaxies. en_US
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US en_US
dc.publisher The American Astronomical Society en_US
dc.subject cosmology en_US
dc.subject galaxies en_US
dc.subject photometry en_US
dc.subject starburst en_US
dc.title Extremely red objects in the Lockman Hole en_US
dc.type Article en_US


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