Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993ap%26ss.204..305m&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 204, no. 2, p. 305-315.
Astronomy and Astrophysics
Astrophysics
2
Active Galactic Nuclei, Interstellar Gas, Line Spectra, Mass Flow, Seyfert Galaxies, Accretion Disks, Astronomical Models, Galactic Structure, Mass Distribution
Scientific paper
The response of the 1549-A C IV emission line profile in the spectrum of Seyfert galaxy NGC 5548 to a sharp continuum drop observed in 1989 is modeled using observational data in the literature. The best agreement between the observed C IV profile changes and the modeled ones is obtained when the mass of the central object is about 1.2 x 10 exp 8 solar masses. The first approximation of the BLR geometry is also found: the inflow takes place only outside two wide cones with a half-opening angle of 65 deg, disposed like a sandglass filled by outflowing material. The nature of a broad blue excess in the C IV profile is discussed.
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