Evidence for an Obscured Quasar in the Giant Radio Galaxy PKS 0634-205

Details Evidence for an Obscured Quasar in the Giant Radio Galaxy PKS 0634-205 Evidence for an Obscured Quasar in the Giant Radio Galaxy PKS 0634-205

Dec 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...454..683s&link_type=abstract

Astrophysical Journal v.454, p.683

Astronomy and Astrophysics

Astronomy

9

Infrared: Galaxies, Galaxies: Individual Alphanumeric: Pks 0634-205, Galaxies: Quasars: General

Scientific paper

We report on optical and near-infrared imaging and spectroscopy of the giant radio galaxy PKS 0634-205. The images longward of 2 microns reveal the presence of an extremely red compact source coincident with the nucleus, which is not detected at shorter wavelengths. The observed K - L color of this source, the [O III] λ5007 flux and the soft X-ray flux, are consistent with the spectral energy distribution of a typical quasar observed through a visual extinction Av ˜ 30 magnitudes. Our 2 microns spectrum shows strong narrow Paα, but has insufficient sensitivity and wavelength coverage to reveal broad Paα from the putative quasar at the predicted level.

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