Speaker
Maurizio Giannotti
(Barry University)
Description
Several stellar systems show a preference for a mild non-standard cooling mechanism when compared with theoretical models. Taken individually, these excesses do not show a strong statistical weight. However, together they seem to indicate a systematic problem with our understanding of stellar evolution and, perhaps, a hint to new physics. Indeed, the exotic cooling could be provided by new Weakly Interacting Slim Particles (WISPs), produced in the hot cores and contributing directly to the energy loss. I will present an overview of the most recent observations and of the available solutions. I will show that Axion-Like Particles (ALPs) represent the best option for this problem. Interestingly, the hinted ALP parameter space is accessible to the next generation proposed ALP searches, such as ALPS II and especially the International Axion Observatory (IAXO).
Author
Maurizio Giannotti
(Barry University)
