On Markaryan 6 and the problem of the intermediate SY 1.5 type

Details On Markaryan 6 and the problem of the intermediate SY 1.5 type On Markaryan 6 and the problem of the intermediate SY 1.5 type

Oct 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982afz....18..541k&link_type=abstract

(Astrofizika, vol. 18, Oct.-Dec. 1982, p. 541-547) Astrophysics (ISSN 0571-7132), vol. 18, no. 4, April 1983, p. 308-312. Transl

Astronomy and Astrophysics

Astrophysics

7

Astronomical Spectroscopy, Galactic Radiation, H Lines, Seyfert Galaxies, Forbidden Transitions, Galactic Evolution, H Beta Line, Spectrum Analysis

Scientific paper

The results obtained from new spectroscopic observations of the variable type 2 Seyfert galaxy Markarian 6 are discussed. The spectra are obtained using the 6-m telescope of the Special Astrophysical Observatory of the USSR Academy of Sciences. It is found that the short-wave components of the hydrogen emission lines discovered in 1969 by Khachikian and Weedman (1970, 1971) can still be observed in the spectrum of this galaxy. A decrease is noted in the equivalent widths of both H-beta and the forbidden lines N1 and N2. It is proposed that what are referred to as the type Sy 1.5 galaxies actually represent a brief phase in the evolution of Sy 2 galaxies.

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