Astronomy and Astrophysics – Astrophysics
Scientific paper
2002-09-02
Astropart.Phys.19:171-192,2003
Astronomy and Astrophysics
Astrophysics
23 pages, 14 figures, accepted by Astroparticle Physics, abstract appeared here has been shortened
Scientific paper
10.1016/S0927-6505(02)00197-4
As the chiral symmetry is widely recognized as an important driver of the strong interaction dynamics, current strange stars models based on MIT bag models do not obey such symmetry. We investigate properties of bare strange stars using the Cloudy Bag Model, in which a pion cloud coupled to the quark-confining bag is introduced such that chiral symmetry is conserved. We find that in this model the decay of pions is a very efficient cooling way. In fact it can carry out most the thermal energy in a few milliseconds and directly convert them into 100MeV photons via pion decay. This may be a very efficient $\gamma$-ray burst mechanism. Furthermore, the cooling behavior may provide a possible way to distinguish a compact object between a neutron star, MIT strange star and Cloudy Bag strange star in observations.
Cheng Kwong Sang
Chu Ming-Chung
Ng Cheuk-Yiu
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