Short timescale broad emission-line flux variability in high-luminosity active galactic nuclei

Details Short timescale broad emission-line flux variability in high-luminosity active galactic nuclei Short timescale broad emission-line flux variability in high-luminosity active galactic nuclei

Jul 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aj....102...41k&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 102, July 1991, p. 41-47.

Other

13

Active Galactic Nuclei, Emission Spectra, Luminosity, Quasars, Astronomical Models, H Beta Line, Line Spectra, Spectrophotometry, Variability

Scientific paper

The standard model of AGN suggests that the broad-line regions of high-luminosity AGN should be so large that any variability in the broad emission-line fluxes should be on timescales of about 2-4 yr or more. Spectrophotometric observations of eight radio-quiet QSOs over a period of 1 yr revealed definite H-beta flux variability in one of these objects and possibly in two others. This may be an indication that the BLRs in high-luminosity AGNs are much smaller than those predicted by the standard model, as is apparently the case in Seyfert galaxies.

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