X-ray observations of IRAS selected Seyfert galaxies and obscuration of the broad-line region

Abstract

view Abstract Citations (110) References (23) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS X-Ray Observations of IRAS Selected Seyfert Galaxies and Obscuration of the Broad-Line Region Ward, M. J. ; Done, C. ; Fabian, A. C. ; Tennant, A. F. ; Shafer, R. A. Abstract We compare the infrared, optical emission-line, and X-ray properties of four IRAS selected Seyfert galaxies with those of a hard X-ray sample of active galactic nuclei (AGN). For three of the four galaxies the properties are consistent with the objects in the X-ray sample. The anomalous IRAS Seyfert appears to be about 10 times underluminous in hard X-rays. Using a new method involving correlations between Balmer decrement and L_X_/Hβ we show that the average reddening law appropriate to the hard X-ray sample of AGN is similar to that measured in our Galaxy. By deriving an average intrinsic ratio of L_X_/Hβ we measure the average unreddened Hα to Hβ ratio in the broad-line region to be 3.5. Publication: The Astrophysical Journal Pub Date: January 1988 DOI: 10.1086/165935 Bibcode: 1988ApJ...324..767W Keywords: Broadband; Infrared Astronomy Satellite; Radio Occultation; Seyfert Galaxies; X Ray Spectroscopy; Active Galactic Nuclei; Balmer Series; H Alpha Line; H Beta Line; Interstellar Extinction; Astrophysics; GALAXIES: SEYFERT; GALAXIES: X-RAYS full text sources ADS | data products SIMBAD (45) NED (41)