Grain temperature, radiation pressure and electric potential in the vicinity of main sequence and white dwarf stars

Details Grain temperature, radiation pressure and electric potential in the vicinity of main sequence and white dwarf stars Grain temperature, radiation pressure and electric potential in the vicinity of main sequence and white dwarf stars

Aug 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26as...57..263l&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 57, Aug. 1984, p. 263-274.

Astronomy and Astrophysics

Astrophysics

9

Interstellar Matter, Main Sequence Stars, Stellar Envelopes, White Dwarf Stars, Electric Potential, Grains, Graphite, Iron, Obsidian, Radiation Pressure, Temperature Profiles

Scientific paper

The results of calculations of the main physical parameters of temperature, lifetime against evaporation, radiation pressure, and electric potential are obtained for spherical grains near main sequence and hydrogen and helium type white dwarf stars. Grain temperature was calculated as a function of stellar distance for grains in the size range from 0.1 to 1 micron and for three types of grain material: silicate (obsidian), iron, and graphite. Radiation pressure is given for grain sizes from 0.01 to 10 microns in size for the same three materials, and grain potentials were calculated as functions of stellar distance for high photoelectron yield (silicate) and low photoelectron yield (graphite) grains embedded in a thermal plasma of 100,000 K temperature. The results are reported in a series of graphs. The interrelations between the parameters are believed to be the driving mechanism behind radiative acceleration of grains in stellar winds.

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