X-ray observations with the Einstein Observatory of emission-line galaxies

Details X-ray observations with the Einstein Observatory of emission-line galaxies X-ray observations with the Einstein Observatory of emission-line galaxies

Jun 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...257...47m&link_type=abstract

Astrophysical Journal, Part 1, vol. 257, June 1, 1982, p. 47-55. Research supported by the Consiglio Nazionale delle Ricerche;

Astronomy and Astrophysics

Astronomy

86

Emission Spectra, Galactic Nuclei, Heao 2, Line Spectra, Seyfert Galaxies, X Ray Astronomy, Absorption Spectra, Galactic Radiation, Proportional Counters, X Ray Sources

Scientific paper

X-ray observations of narrow-emission-line galaxies are presented and discussed. One source, NGC 1365, is found to be extended in the soft X-ray band; three others, NGC 2992, NGC 5506, and NGC 7582, have been observed to vary in intensity. The best fit spectral index and cutoff energy Ea are derived for NGC 2992, NGC 5506, and NGC 7582. The X-ray spectra of these galaxies are similar to those of type 1 Seyfert galaxies. In the case of NGC 5506 and NGC 7582, the absorbing column NH derived is about one order of magnitude greater than predicted from the reddening of thy optical continuum and of the Balmer lines. Possible explanations for the discrepancy are discussed.

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