Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978afz....14..537g&link_type=abstract
Astrofizika, vol. 14, Nov. 1978, p. 537-551. In Russian.
Astronomy and Astrophysics
Astronomy
6
Line Spectra, Radiation Pressure, Stellar Envelopes, Angular Momentum, Axisymmetric Flow, Integral Equations, Kinematics, Optical Thickness
Scientific paper
Light pressure produced by spectral-line radiation in gaseous systems with supersonic axisymmetric motions and local radiative coupling is considered. It is shown that differential rotation leads to asymmetry in the angular distribution of the system's line optical depth and, as a result of this, to a tangential light-pressure component. When the radiation interacts with the gas, the latter acquires some angular momentum; the corresponding angular-momentum increment, with the opposite sign, is transferred to the radiation and removed from the system. As a result of the transformation of part of the system's internal energy to line radiation, the system's rotation will be intensified or dampened, depending on the sign of the source-function gradient.
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