Radiatively driven winds from extended sources

Details Radiatively driven winds from extended sources Radiatively driven winds from extended sources

Feb 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....82...99b&link_type=abstract

Astronomy and Astrophysics, vol. 82, no. 1-2, Feb. 1980, p. 99-109.

Astronomy and Astrophysics

Astrophysics

14

Quasars, Radiation Absorption, Stellar Winds, Supersonic Flow, Wind Velocity, Flow Equations, Kinetic Energy, Lyman Spectra, Mass Transfer, Stellar Gravitation, Stellar Luminosity, Thermodynamic Equilibrium

Scientific paper

The paper studies spherically symmetric, radiation-driven winds from sources whose mass-loss and luminosity generation extend throughout a volume interior to some radius R(Q). In contrast to winds from a point source, a smooth transition from sub- to supersonic flow can take place even when the radiation acceleration exceeds the gravitational acceleration at the sonic point. Thus radiation dominated supersonic flow is possible. In the case that the wind is fully ionized, electron scattering is the dominant driving mechanism. Such winds, if optically thin and emerging from uniform sources, can convert about one-tenth of one-percent of the bolometric luminosity into mechanical energy of flow. Thus for luminous QSOs (about 10 to the 48th erg/s) winds carrying 10 to the 45th erg/s are plausible.

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