Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975ap%26ss..34..149s&link_type=abstract
(Symposium on Solid State Astrophysics, Cardiff, Wales, July 9-12, 1974.) Astrophysics and Space Science, vol. 34, Apr. 1975, p.
Astronomy and Astrophysics
Astrophysics
Late Stars, Polarization Characteristics, Refractivity, Silicates, Stellar Envelopes, Temperature Effects, Astronomical Models, Graphite, Nebulae, Optical Properties, Temperature Distribution
Scientific paper
The influence of temperature changes in circumstellar silicate-like envelopes upon the polarization effects is investigated. It is shown that under the assumption that ATg>50° and con- ductivity of silicate grains is indirectly proportional to Tg this mechanism can be responsible for the observed dependence of intensity vs polarization in some late-type stars, e.g. V CVn. The same effects can be produced by dirty ices and graphite grains. It is suggested that irradiation by electrons and/or protons can affect the circumstellar envelopes in a similar way, especially those of early-type stars, and irradiation by neutrons can exert an influence on the envelopes of supernovae
Solc Martin
Svatos Jan
Vanysek Vl.
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