Broad emission line variability in the Seyfert 1 galaxies NGC 5548 and NGC 3783

Details Broad emission line variability in the Seyfert 1 galaxies NGC 5548 and NGC 3783 Broad emission line variability in the Seyfert 1 galaxies NGC 5548 and NGC 3783

Jul 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...200....9s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 200, no. 1-2, July 1988, p. 9-16. Research supported by ASTRON and ZWO.

Astronomy and Astrophysics

Astronomy

67

Emission Spectra, H Alpha Line, H Beta Line, Line Shape, Line Spectra, Seyfert Galaxies, Active Galactic Nuclei, Astronomical Models, Balmer Series, Black Holes (Astronomy)

Scientific paper

This paper presents recent high-quality spectra of the Seyfert 1 galaxies NGC 5548 and NGC 3783, in which H-alpha and H-beta were observed at different epochs with time intervals of 4 to 13 months. The difference spectra show that, during the periods separating the observing runs, the broad emission lines have undergone variations not only in flux but also in shape. Moreover, the broad line profiles of H-alpha and H-beta in NGC 5548 have changed differently, suggesting that two components with different physical characteristics are present in the broad line region. However, the findings do not support the supermassive binary scenario of Petersen (1987) for NGC 5548.

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