UB V observations of Seyfert and -emission-line galaxies

Details UB V observations of Seyfert and -emission-line galaxies UB V observations of Seyfert and -emission-line galaxies

Jan 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979mnras.186..297p&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Vol. 186, p. 297 (1979)

Astronomy and Astrophysics

Astronomy

40

Scientific paper

UBV observations of eight southern Seyfert galaxies and five selected emission-line galaxies have been taken over 3 yr. For the Seyfert galaxies it was found that the amplitude of light variation increased at shorter wavelengths, and that the variations show repetition on time-scales varying from 20 day for NGC3783, up to 1 yr and longer for NGC 1566. Seyferts with the bluest nuclei have the shortest time-scales of variation. Evidence is presented to add to that already existing which suggests that the objects in the nuclei of Seyferts are under-luminous quasars. The observations of the emission-line galaxies do not suggest that they are less energetic counterparts of Seyfert galaxies, occupying a position intermediate between the Seyferts and normal spiral galaxies.

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