FIRST-2MASS sources below the APM detection threshold: A Population of highly reddened quasars
Feb, 2004
40 pages
Published in:
- Astrophys.J. 607 (2004) 60-75
e-Print:
- astro-ph/0402386 [astro-ph]
DOI:
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Abstract: (arXiv)
We have constructed a sample of bright near-infrared sources which are detected at radio wavelengths but undetected on the POSS I plates in order to search for a population of dust-obscured quasars. Optical and infrared spectroscopic followup of the sample has led to the discovery of seventeen heavily reddened quasars (B-K>6.5), fourteen of which are reported here for the first time. This has allowed us to define a region in the R-K, J-K color plane in which 50% of the radio-selected objects are highly reddened quasars. We compare the surface density of this previously overlooked population to that of UVX- radio-selected quasars, finding that they make up ~20% of the total quasar population for K < 15.5.References(41)
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