Computer Science
Scientific paper
May 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aipc..254..212w&link_type=abstract
Testing the AGN paradigm. AIP Conference Proceedings, Volume 254, pp. 212-215 (1992).
Computer Science
Radiation Mechanisms, Polarization
Scientific paper
In the Seyfert galaxy Fairall 9, low-ionization lines (threshold energy between 1 and 3 Ry) appear to follow the UV bump and have a larger variation scale. The high-ionization lines vary in step with the power-law continuum. The results suggest that the variation amplitude of lines is inversely correlated to the ionization level. Our calculations suggest that the UV bump has a shape more complicated than a simple blackbody curve and has a quite steep drop around 30 eV. The degree of luminosity dependence of equivalent width of Lyα, C iii], Si iv, and C iv is inversely correlated with individual emission line's ionization level. This offers a natural explanation as to why only the C iv equivalent width shows a significant luminosity dependence (the Baldwin effect).
Li-Zhi Fang
Luc Binette
Wei Zheng
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