Evidence for kinematic variation with ionization level in quasars

Details Evidence for kinematic variation with ionization level in quasars Evidence for kinematic variation with ionization level in quasars

Oct 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985pasp...97..966m&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 97, Oct. 1985, p. 966-969.

Astronomy and Astrophysics

Astronomy

23

Gas Ionization, Quasars, Spectral Line Width, Carbon, Magnesium, Photoionization, Seyfert Galaxies

Scientific paper

The authors combine new observations of broad linewidths for C IV λ1548 and Mg II λ2800 in quasars with previously published widths. C IV λ1548 is systematically broader. The kinematics and geometry of the broad line-emitting gas evidently depend on the ionization level. A single photoionized cloud is therefore a poor approximation to typical conditions in the line-emitting gas. These results also suggest that the acceleration mechanism is less efficient for more optically thick gas clouds.

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