Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.263..711g&link_type=abstract
In ESA Proceedings of an International Symposium on New Insights in Astrophysics. Eight Years of UV Astronomy with IUE p 711-71
Astronomy and Astrophysics
Astrophysics
2
Galactic Nuclei, Line Spectra, Quasars, Stellar Spectra, Ultraviolet Spectra, Active Galactic Nuclei, Iue, Light Curve, Stellar Luminosity, Time Lag
Scientific paper
The ultraviolet light curves of two quasars, Q0405-123 and Q1202+281 are described. In these spectra, and particularly in the spectrum of Q1202+281, both the continuum and emission lines are variable over a short time scale. These data in conjunction with data on other active galactic nuclei (AGNs) demonstrate that variability of permitted emission lines is common to AGNs over a large luminosity range. The time-lag between a change in the continuum and the corresponding change in the permitted emission lines is short (less than 41 days) in these two quasars, which means that the broad line region (BLR) is considerably smaller than has been assumed in the past. The implications of these observations for the accepted models of BLR are discussed.
Gondhalekar P. M.
O'Brien P. T. .
Wilson Raymond
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