Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983mnras.202..453b&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 202, Feb. 1983, p. 453-466.
Astronomy and Astrophysics
Astronomy
48
Iue, Seyfert Galaxies, Ultraviolet Astronomy, Continuous Spectra, Emission Spectra, Line Spectra, Luminosity, Synchrotron Radiation, Ultraviolet Spectra
Scientific paper
The results of three years of monitoring the spectral variability of the type 1 Seyfert galaxy NGC 3783 with IUE spacecraft instrumentation are reported. Techniques for fitting power laws to the observed wavebands are described, noting the monitoring was carried out in the 1150-3150 A region. The continuum was found to vary by a factor of ten over several months time, and by 40% in two days. A positive correlation was determined between the continuum luminosity and the power law spectral index, indicating a synchrotron emission arising from nonthermal relativistic electrons heated by Fermi acceleration and cooled by relativistic bremmstrahlung emission. Similar variability was observed in the C III and C IV emission lines.
Barr Paul
Willis Alan J.
Wilson Raymond
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