Neutron Star Cooling via Axion Emission by Nucleon-Nucleon Axion Bremsstrahlung

Understand

Neutron stars generally cools off by the emission of gamma rays and neutrinos.

• But axions can also be produced inside a neutron star by the process of nucleon-nucleon axion bremsstrahlung.
• The escape of these axions adds to the cooling process of neutron star.
• We explore the nature of cooling of neutron stars including the axion emission and compare our result with the scenario when the neutron star is cooled by only the emission of gamma rays and neutrinos.