Abstract
We investigate the electric potential of high speed interstellar grains trapping radioactive nuclei which are suggested to exist in interstellar medium by the study of meteorite samples and the gamma-ray line observation. These radioactive nuclei, e.g.22Na,26Al,44Ti and60Fe bring about a drastic change in grain potential. Grains with larger radius than the critical radiusa c attain a negative potential when grains are traversing a typical intercloud region.
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Yanagita, S. Electric charge of grains and interstellar radioactivity. Astrophys Space Sci 49, L11–L15 (1977). https://doi.org/10.1007/BF00641997
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DOI: https://doi.org/10.1007/BF00641997