A variable flow as the underpinning of broad absorption lines in quasi-stellar objects

Details A variable flow as the underpinning of broad absorption lines in quasi-stellar objects A variable flow as the underpinning of broad absorption lines in quasi-stellar objects

Feb 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...349l..35b&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 349, Feb. 1, 1990, p. L35-L38.

Astronomy and Astrophysics

Astrophysics

3

Absorption Spectra, Quasars, Astronomical Models, Radiative Transfer, Shock Waves, Velocity Distribution

Scientific paper

It is suggested that the salient features of the velocity structure underlying the broad absorption lines of some quasars (BAL QSOs) are produced in a time-variable, freely expanding wind. The observed span in velocities of absorbing elements is produced by time variations in the ejection speed of the gas and not by acceleration of the gas in the absorption region, as must be the case in steady state models. Such a wind is characterized by time-dependent mass injection and energy injection rates.

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