Abstract
view Abstract Citations (24) References (37) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS X-ray and optical studies of emission-line Markarian galaxies. Ulvestad, J. S. ; Wilson, A. S. Abstract The X-ray and optical properties of a selection of compact nucleus, emission line Markarian galaxies have been studied. Observations with the Einstein Observatory have detected X-rays from all the Seyfert galaxies and none of the narrow emission line galaxies in the sample. This result supports the idea that powerful X-ray emission is correlated with the presence of a broad optical emission line component. The emission line spectra of the Seyfert galaxies show much higher excitation than do the narrow-line galaxies, whose spectra are similar to those of H II regions. Both the optical properties and the radio and X-ray upper limits of the non-Seyfert galaxies are consistent with the suggestion that those objects have undergone bursts of massive star formation. Publication: The Astronomical Journal Pub Date: March 1983 DOI: 10.1086/113314 Bibcode: 1983AJ.....88..253U Keywords: Astronomical Spectroscopy; Emission Spectra; Galactic Nuclei; Line Spectra; Markarian Galaxies; Seyfert Galaxies; X Ray Sources; Early Stars; H Ii Regions; H Lines; Spectrophotometry; Visible Spectrum; Astronomy full text sources ADS | data products NED (11) SIMBAD (9)
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