Mathematics – Probability
Scientific paper
Jul 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...207..425c&link_type=abstract
Astrophysical Journal, vol. 207, July 15, 1976, pt. 1, p. 425-431.
Mathematics
Probability
4
Graphite, Interstellar Matter, Radiation Damage, Stellar Envelopes, Stellar Mass Ejection, Anisotropic Media, Astronomical Models, Crystal Structure, Diamagnetism, Interstellar Magnetic Fields, Irradiation, Stellar Atmospheres
Scientific paper
The effect of stellar particle irradiation on carbon-grain alignment mechanisms has not been previously considered. In fact, very little attention has been given to the effect of radiation damage on that particulate matter which exists in stellar atmospheres or in circumstellar clouds and which is ultimately ejected into the interstellar medium. Estimates are made to show that the fast-particle radiation flux in the region of stellar grain formation is sufficiently high to reduce significantly the diamagnetic anisotropy of graphite carbon grains and, therefore, to diminish considerably the probability for their preferential orientation in a galactic magnetic field. Since radiation damage to any grains found in the interstellar medium can be expected to a degree, and since this would severely alter their original physical properties, it is suggested that models based on the physical properties of interstellar grains are incomplete until the alteration of these properties by fast-particle irradiation has been considered.
Czyzak Stanley J.
Meese J. M.
Santiago Judson
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