Stellar production as a source of He-3 in the interstellar medium

Details Stellar production as a source of He-3 in the interstellar medium Stellar production as a source of He-3 in the interstellar medium

Jul 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...207l..57r&link_type=abstract

Astrophysical Journal, vol. 207, July 1, 1976, pt. 2, p. L57-L60.

Mathematics

Logic

91

Helium Isotopes, Interstellar Matter, Nuclear Fusion, Planetary Nebulae, Stellar Evolution, Stellar Models, Abundance, Cosmology, Gas Evolution, Stellar Envelopes, Stellar Mass

Scientific paper

Results from a number of Population I and Population II stellar models are presented which confirm that He-3 is produced in substantial quantities in the outer parts of low-mass stars. It is shown that the He-3 is mixed into the convective envelopes when the stars evolve into giants, that much of the He-3 reaches the interstellar medium, and that the low-mass stars alone should enrich that medium to a He-3 abundance greater than the protosolar value. Reasons are examined for the result that the solar-system He-3 abundance is smaller than estimates of the interstellar abundance, and the possibility of using the He-3 abundance as a constraint on cosmological models is considered. It is suggested that the present interstellar He-3 is more of stellar than primordial origin.

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