Abstract
We investigated the kinematics and ionization mechanism of the innermost arc seconds of the nucleus of NGC 6764 (SBb), using spatially-resolved optical spectra. The observed radial variations of the emission line ratios cannot be explained by one single-ionizing agent, but are consistent with circumnuclear ionizeation by hot stars in addition to a central power-law source. We conclude that NGC 6764 is a Composite Galactic Nucleus (CGN).
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Visiting Astronomer, German-Spanish Astronomical Center, Calar Alto, operated by the Max-Planck-Institut für Astronomie in Heidelberg jointly with the Spanish National Commission for Astronomy.
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Boer, B., Schulz, H. The composite galaxy NGC 6764: Nuclear activity and circumnuclear star formation. Astrophys Space Sci 163, 201–210 (1990). https://doi.org/10.1007/BF00655740
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DOI: https://doi.org/10.1007/BF00655740