The Helium Emission Line Profiles in the Spectrum of the Nucleus of Seyfert Galaxy NGC3227 at Different Epochs of its Activity
Abstract
The spectral data, obtained by Russian-Turkish 1.5 m.telescope RTT-150 in April, 2009, and the published data served as the base for the investigation of the shapes of the emission line profiles in the spectrum of the nucleus of Seyfert Galaxy NGC 3227 at different epochs of its activity: in 1967, 1977 and 2009. The results of investigations of the shapes of the helium line profiles allowed of assuming that there had been no cardinal changes of the galactic nucleus of the Seyfert type from 1977 to 2009; however, a significant weakening in the jet activity of the galactic nucleus was revealed in that time interval..
- Publication:
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Odessa Astronomical Publications
- Pub Date:
- 2011
- Bibcode:
- 2011OAP....24...59B
- Keywords:
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- Galaxies: Seyfert;
- individual: NGC 3227.