Non-standard neutrino interactions and the evolution of red giants

Details Non-standard neutrino interactions and the evolution of red giants Non-standard neutrino interactions and the evolution of red giants

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...264..536r&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 264, no. 2, p. 536-546.

Astronomy and Astrophysics

Astrophysics

39

Elementary Particle Interactions, Neutrinos, Red Giant Stars, Stellar Evolution, Star Clusters, Stellar Structure

Scientific paper

If neutrinos have a magnetic dipole moment, munu, the plasmon decay rate is enhanced, leading to a delay of helium ignition in red giants. We study numerically the impact of nonstandard neutrino losses on the RGB, and especially we derive a new relationship between munu and the core mass and luminosity at helium ignition. Moreover, we study systematic uncertainties in the evolutionary results by varying some physical assumptions within plausible limits. The systematic error of globular cluster bounds on neutrino dipole moments caused by these effects is not larger than the statistical error in the observational data sample. The systematic uncertainties caused by the helium core flash and those of the horizontal branch evolution remain to be investigated.

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