Behavior of the broad Hα component in the Seyfert galaxy NGC 4151 in 1976 2003

Details Behavior of the broad Hα component in the Seyfert galaxy NGC 4151 in 1976 2003 Behavior of the broad Hα component in the Seyfert galaxy NGC 4151 in 1976 2003

Aug 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004arep...48..622d&link_type=abstract

Astronomy Reports, vol. 48, Issue 8, p.622-628

Astronomy and Astrophysics

Astronomy

Scientific paper

Variations in the flux and profile of the broad Hα component in the Seyfert galaxy NGC 4151 are analyzed based on spectral observations acquired from 1976 to spring 2003. The procedure used to distinguish components is described. There is a strong correlation between the flux of the broad Hα component and the U flux of the galactic nucleus. There was an appreciable increase in the intensity of the broad Hα in 1990 2000, with the flux reaching a maximum in 1996. The intensity and shape of an emission feature that appeared in the red wing of the broad Hα component at the end of 2002 are estimated.

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