Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...296...69r&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 296, Sept. 1, 1985, p. 69-89.
Astronomy and Astrophysics
Astrophysics
137
Active Galaxies, Galactic Nuclei, Galaxies, Luminosity, X Ray Spectra, Astronomical Spectroscopy, Photons, Solid State Devices
Scientific paper
The X-ray spectra of a sample of 12 low-luminosity AGNs observed using the solid state spectrometer on the HEAO 2 satellite are investigated. The AGNs discussed here have X-ray luminosities below about 10 to the 44th erg/s, and thus form a sample complementary to the higher luminosity sample discussed by Petre et al. (1984). The spectra are well described by a simple model consisting of a power law, with photon spectral index about 1.7, plus absorption by cold gas. The objects in the sample can be separated into three groups: (1) those whose spectra show no significant absorption; (2) those for which the X-ray source is totally covered by a spatially uniform absorbing medium; and (3) those for which partial covering by 'patchy' absorbers is indicated. Column densities and covered fractions do not correlate systematically with X-ray luminosity. Implications regarding physical conditions in AGNs are discussed.
Holt Stephen S.
Mushotzky Richard F.
Petre Rob
Reichert Gail A.
No associations
LandOfFree
Soft X-ray spectral observations of low-luminosity active galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Soft X-ray spectral observations of low-luminosity active galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Soft X-ray spectral observations of low-luminosity active galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-798626