3000 Å bump of type I Seyfert galaxies and its appearance on colour-colour diagram.

Details 3000 Å bump of type I Seyfert galaxies and its appearance on colour-colour diagram. 3000 Å bump of type I Seyfert galaxies and its appearance on colour-colour diagram.

Jan 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990acaps..10....1b&link_type=abstract

Acta Astrophys. Sin., Vol. 10, No. 1, p. 1 - 11

Astronomy and Astrophysics

Astrophysics

Seyfert Galaxies: Continuum Radiation, Seyfert Galaxies: Broad-Line Regions, Quasars: Radiation Mechanisms

Scientific paper

Assuming that the main continuum emission mechanisms of type I Seyfert galaxies in visual and UV bands are power-law nonthermal emission, blackbody emission, recombination emission of Balmer continuum in the broad line region and high order Balmer line emission, the authors calculate the parameters of these mechanisms from their colour indices (U-B, B-V) and find that the results agree with those obtained from the spectrophotometric measure. The authors determine the ratio of the thermal component to the whole emission for type I Seyfert galaxies with the values of colour indices and give a method to study emission mechanism of QSOs in visual and UV bands.

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