Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...324..767w&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 324, Jan. 15, 1988, p. 767-775.
Astronomy and Astrophysics
Astronomy
102
Broadband, Infrared Astronomy Satellite, Radio Occultation, Seyfert Galaxies, X Ray Spectroscopy, Active Galactic Nuclei, Balmer Series, H Alpha Line, H Beta Line, Interstellar Extinction
Scientific paper
The IR, optical emission-line, and X-ray properties of four IRAS selected Seyfert galaxies are compared with those of a hard X-ray sample of 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)/H-beta it is shown that the average reddening law appropriate to the hard X-ray sample of AGN is similar to that measured in the Galaxy. By deriving an average intrinsic ratio of L(X)/H-beta, the average unreddened H-alpha to H-beta ratio in the broad-line region is measured to be 3.5.
Done Christine
Fabian Andrea C.
Shafer Richard A.
Tennant Allyn F.
Ward Martin J.
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