Stellar evolution considerations are of fundamental importance in our understanding of the axion/ALP-photon coupling, g_{a\gamma}. Helium burning stars are the best laboratories to study this coupling. Here, we will review the bounds from massive and low mass helium burning stars, and present a new analysis of the bound from the horizontal branch stars. The analysis provides the strongest bound to date on g_{a\gamma} in a wide mass range.
@article{arxiv.1409.7981,
title = {Stellar Evolution Bounds on the ALP-Photon Coupling: new Results and Perspectives},
author = {Maurizio Giannotti},
journal= {arXiv preprint arXiv:1409.7981},
year = {2014}
}
Comments
4 pages, 1 figure. Contributed to the 10th Patras Workshop on Axions, WIMPs and WISPs, CERN, June 29 to July 4, 2014