Variability of NGC 5543: The continuum

Details Variability of NGC 5543: The continuum Variability of NGC 5543: The continuum

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988esasp.281b.311r&link_type=abstract

In its Proceedings of the Celebratory Symposium on a Decade of UV Astronomy with the IUE Satellite, Volume 2 p 311-314 (SEE N89-

Astronomy and Astrophysics

Astronomy

3

Galactic Radiation, Iue, Light Curve, Seyfert Galaxies, Ultraviolet Astronomy, Ultraviolet Spectra, Black Body Radiation, Color, Continuums, Spaceborne Astronomy, Variability

Scientific paper

Simultaneous UV and optical variations of NGC 5548 suggest a common origin of the continuum flux at both ranges. If the bulk of the UV flux had a black body like shape, its optical contribution would be too low to account for the observed variations, and a connection between UV and FIR changes would be needed, which is not observed. However, a flat (alpha = -0.5) UV power-law is sufficient to reproduce the simultaneous changes in the UV and optical fluxes, and gives the correct F(5500)/F(1350) ratio. Although the data are not conclusive, the shape of the UV-optical continuum seems to change only slightly from the faintest to the brightest states.

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