Emission-line variability in Seyfert galaxies

Details Emission-line variability in Seyfert galaxies Emission-line variability in Seyfert galaxies

Jan 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988pasp..100...18p&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 100, Jan. 1988, p. 18-36.

Astronomy and Astrophysics

Astronomy

113

Active Galaxies, Emission Spectra, Line Spectra, Periodic Variations, Seyfert Galaxies, Astronomical Models, Astronomical Spectroscopy, Photoionization, Spectral Line Width

Scientific paper

Observations and theory of emission-line variability in Seyfert galaxies are reviewed in the context of standard photoionization models of the emission-line regions. Expected time scales for variability and systematic effects which can give misleading results are discussed. Published observations of emission-line variability are summarized. The implications of these observations are noted, particularly the physical consequences of broad-line regions that variability analysis indicates are an order of magnitude smaller than predicted by standard photoionization models.

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