Resonance radiation pressure on interstellar atoms

Details Resonance radiation pressure on interstellar atoms Resonance radiation pressure on interstellar atoms

Aug 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983azh....60..694m&link_type=abstract

(Astronomicheskii Zhurnal, vol. 60, July-Aug. 1983, p. 694-702) Soviet Astronomy (ISSN 0038-5301), vol. 27, July-Aug. 1983, p. 4

Astronomy and Astrophysics

Astronomy

1

Atomic Excitations, Black Body Radiation, Fokker-Planck Equation, Interstellar Matter, Radiation Pressure, Stellar Radiation, Hydrogen Clouds, Momentum Transfer, Planetary Nebulae, Resonance

Scientific paper

Fokker-Planck equations are derived to describe the motion of atomic particles impacted by radiation pressure and momentum diffusion in a broad-band radiation field. Two cases are considered: an arbitrary spectrum and a blackbody spectrum. Two- and three-level approximations are adopted for the atomic transitions. An analysis is given of the dependence of the radiation pressure force and the momentum-diffusion tensor upon the particle velocity and the radiant intensity in the interstellar environment. Estimates are obtained for the change in the velocity of interstellar H atoms due to radiation pressure and for the heating rate due to momentum diffusion.

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