X-ray emission from active galaxies

Details X-ray emission from active galaxies X-ray emission from active galaxies

Mar 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981ssrv...30...39h&link_type=abstract

(European Space Agency, ESLAB Symposium on X-ray Astronomy, 15th, Amsterdam, Netherlands, June 22-26, 1981.) Space Science Revie

Astronomy and Astrophysics

Astronomy

14

Active Galaxies, Ariel 5 Satellite, Emission Spectra, Galactic Radiation, Line Spectra, Proportional Counters, Seyfert Galaxies, X Ray Sources, Luminosity, Photoionization, Spectrum Analysis, X Ray Spectra

Scientific paper

All the Ariel V spectrometer observations of Seyfert and narrow emission line galaxies (including some not previously published) are reviewed. The X-ray spectral properties of this class of object are examined and the data are used to investigate the nature of the source. Low energy absorption and iron line emission features are found to be variable. The low energy absorption can be explained in terms of clouds in the broad line region moving across the line of sight. There is no correlation between X-ray luminosity and low energy absorption, which implies that the accreting material is different from the obscuring material. Variable iron line emission may be explained as recombination emission from highly photoionized gas, but the iron line emission expected at low luminosities has not been detected.

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