New optical and radio observations of the X-ray galaxies NGC 7582 and NGC 2992

Details New optical and radio observations of the X-ray galaxies NGC 7582 and NGC 2992 New optical and radio observations of the X-ray galaxies NGC 7582 and NGC 2992

Nov 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980mnras.193..563w&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 193, Nov. 1980, p. 563-582.

Astronomy and Astrophysics

Astronomy

111

Extragalactic Radio Sources, Galactic Radiation, Optical Emission Spectroscopy, X Ray Sources, Astronomical Maps, Compton Effect, Cosmic Dust, Nuclear Radiation, Radio Astronomy, Seyfert Galaxies

Scientific paper

Radio maps and spectrophotometric observations of two X-ray emitting emission-line galaxies, NGC 7582 and 2992, are presented, which suggest that their nuclear emission has Seyfert-like characteristics. These characteristics are contrasted with the properties of the companion galaxies NGC 7552 and 2993 which, although exhibiting emission-line spectra, are thought to be dominated by thermal processes. Direct AAT plates show the presence of substantial amounts of dust in all four galaxies. Estimates of the extinctions appropriate to the emission-line and continuum-emitting regions are made. Interstellar reddenings of approximately 3.5-4.0 mag are found for the emission lines and approximately 1.0 mag for the continuum. The total energy distributions of NGC 7582 and 2992 are very similar and may be explained by simple synchrotron self-Compton theory. These galaxies are typical of nearby galaxies which exhibit nonthermal activity.

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