Other
Scientific paper
Jul 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005ycat..21540155a&link_type=abstract
VizieR On-line Data Catalog: J/ApJS/154/155. Originally published in: 2004ApJS..154..155A
Other
X-Ray Sources, Infrared Sources
Scientific paper
We investigate the luminous X-ray sources in the Lockman Hole (LH) and the extended Groth strip (EGS) detected at 24{mu}m using the Multiband Imaging Photometer (MIPS) and also with the Infrared Array Camera (IRAC) on board the Spitzer Space Telescope. We assemble optical/infrared spectral energy distributions (SEDs) for 45 X-ray/24{mu}m sources in the EGS and LH. Only about one-quarter of the hard X-ray/24{mu}m sources show pure type 1 active galactic nucleus (AGN) SEDs. More than half of the X-ray/24{mu}m sources have stellar emission-dominated or obscured SEDs, similar to those of local type 2 AGN and spiral/starburst galaxies. One-third of the sources detected in hard X-rays do not have a 24{mu}m counterpart. Two such sources in the LH have SEDs resembling those of S0/elliptical galaxies. The broad variety of SEDs in the optical-to-Spitzer bands of X-ray-selected AGNs means that AGNs selected according to the behavior in the optical/infrared will have to be supplemented by other kinds of data (e.g., X-ray) to produce unbiased samples of AGNs.
(1 data file).
Alonso-Herrero Almudena
Balcells Marc
Barmby Pauline
Cristobal-Hornillos David
Dole Herve
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