The Reddest Quasars - Below the APM Detection Threshold

Details The Reddest Quasars - Below the APM Detection Threshold The Reddest Quasars - Below the APM Detection Threshold

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aas...203.7820g&link_type=abstract

American Astronomical Society Meeting 203, #78.20; Bulletin of the American Astronomical Society, Vol. 35, p.1328

Astronomy and Astrophysics

Astronomy

Scientific paper

We have constructed a sample of bright near-infrared sources which are both detected at radio wavelengths and are 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), and has allowed us to define a region in the R-K, J-K color plane in which 50% of the objects are quasars. We compare the surface density of this previously overlooked population to that of UVX- and radio-selected quasars, finding that they comprise at least ˜ 5% of the total quasar population for K<16.

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