2004ApJS..154..107W

Query : 2004ApJS..154..107W

2004ApJS..154..107W - Astrophys. J., Suppl. Ser., 154, 107-111 (2004/September-0)

Extremely Red Objects in the Lockman hole.

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 FLOC'H 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. and SURACE J.

Abstract (from CDS):

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/arcmin2; [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.

Abstract Copyright: ∼

Journal keyword(s): Cosmology: Observations - Galaxies: Evolution - Galaxies: High-Redshift - Galaxies: Photometry - Galaxies: Starburst - Infrared: Galaxies

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Lockman Hole reg 10 45 00.0 +58 00 00           ~ 910 0

Query : 2004ApJS..154..107W

Basic data :
NAME Lockman Hole -- Region defined in the Sky
Other object types: otypes_help 		reg ([SFD98])
ICRS coord. (ep=J2000) : 		10 45 00.0 +58 00 00 [ ] E 2011ApJ...734...99H
FK4 coord. (ep=B1950 eq=1950) : 		10 41 51.0 +58 15 47 [ ]
Gal coord. (ep=J2000) : 		149.7686 +52.0314 [ ]
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Hierarchy : number of linked objects
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Identifiers (4) :
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NAME Lockman Hole NAME the Hole NAME the LJM Hole [SFD98] J1048+5702

References (910 between 1850 and 2026) (Total 910)
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