Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994phrvd..50.6089m&link_type=abstract
Physical Review D (Particles, Fields, Gravitation, and Cosmology), Volume 50, Issue 10, 15 November 1994, pp.6089-6099
Astronomy and Astrophysics
Astrophysics
3
Neutron Stars, Nuclear Matter
Scientific paper
Axion emission processes in degenerate neutron-star matter in the presence of a condensate of neutral or charged pions or kaons are studied. It is found that the presence of a neutral-pion condensate enhances axion emission over ordinary neutron-star matter as drastically as it enhances neutrino emission. Owing to a quartic temperature dependence, the energy loss due to axion emission in the interior could significantly accelerate the star's thermal evolution for the values of axion parameters that are currently allowed under astrophysical considerations. In addition, it could compete with surface photon radiation for the major part of the star's cooling phase, which may result in a reduced temperature difference between the interior and the surface.
Iwamoto Naoki
Muto Takumi
Tatsumi Toshitaka
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