The C IV 1550 profile in type 1 Seyfert galaxies

Details The C IV 1550 profile in type 1 Seyfert galaxies The C IV 1550 profile in type 1 Seyfert galaxies

Jul 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...247..449w&link_type=abstract

Astrophysical Journal, Part 1, vol. 247, July 15, 1981, p. 449-457.

Astronomy and Astrophysics

Astronomy

26

Carbon, Galactic Radiation, Seyfert Galaxies, Spectral Line Width, Ultraviolet Spectra, Absorption Spectra, Balmer Series, Emission Spectra, Iue, Line Spectra, Molecular Clouds, Random Processes, Red Shift, Spaceborne Astronomy

Scientific paper

The paper presents C IV 1550 A line profiles for the type 1 Seyfert galaxies NGC 5548, Mrk 509, NGC 7469, and MCG-2-58-22. Several line broadening mechanisms and theoretical line profiles are considered, and random motion of discrete clouds is ruled out. A spherical ensemble of discrete clouds with steady outflow or inflow produces a logarithmic profile, but does not account for the highly extended wings. A spherical ensemble with ballistic outflow produces a profile of the first exponential integral function, and fits the observed profile to the continuum level. Although C IV profiles favor the ballistic model, both Mrk 509 and NGC 7469 have significant asymmetry, and Balmer lines with a higher optical depth show higher asymmetry and redshift than all four galaxies.

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