Constraint on the axion-electron coupling constant and the neutrino magnetic dipole moment by using the tip-RGB luminosity of fifty globular clusters

2019/10/23 by Santiago Arceo Díaz, Klaus-Peter Schröder, Díaz, Santiago Arceo +7 · 1 citation
Physics and Astronomy · #FOS: Physical sciences #Solar and Stellar Astrophysics (astro-ph.SR) #astro-ph.SR

paper · pdf · doi:10.48550/arxiv.1910.10568

To be submitted to Astroparticle Physics Journal

arxiv created 2019/10/23 · arxiv updated 2019/10/24

Abstract

The current constraints in the neutrino magnetic dipole moment and axion-electron coupling constant (\mathrmμ_ν≤2.2×10^-12μ_B and \mathrmα_ae≤0.5×10^-26) are tested against the observational calibration on the tip-RGB of fifty galactic globular clusters, covering -1.95≤[M/H]≤+0.04. When each energy sink is introduced into stellar models separately, the current known constraints predict a tip-RGB bolometric luminosity that does not conflict the calibration, while when they are assumed to occur simultaneously, these constraints can be lowered down by 50% and 75%.

Cited by

• Isochrone fitting of Galactic globular clusters - IX. Tip of the red-giant branch for 27 clusters and constraints on new particle physics

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