The ultra nova model of cosmic gamma ray bursts.

Details The ultra nova model of cosmic gamma ray bursts. The ultra nova model of cosmic gamma ray bursts.

Jun 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000injpb..74..175m&link_type=abstract

Indian J. Phys., Part B, Vol. 74B, No. 3, p. 175 - 178

Computer Science

Sound

Gamma-Ray Bursts: Models, Gamma-Ray Bursts: Neutron Stars

Scientific paper

Points out that several stiff nuclear equations of state allow existence of ultra compact neutron stars (UCNSs) whose surface gravitational redshifts (z) could be much higher than that of a canonical neutron star (z = 0.19). The author shows that even though the energy released in the form of ν-ν¯s during the formation of UCNSs rises modestly as Qν ≡ z, the energy of the resultant electromagnetic fireball ν+ν¯→e-+e+ sizes dramatically as QFB ≡ z2.25(1+z)4.5. Accordingly the author outlines the (new) class of model for the luminous (Qγ ≥ 1052erg) gamma ray bursts associated with birth of ultra compact objects. Even if z ≤ 0.615, which is appropriate if the sound speed within the compact object is restricted to be cs ≤ c/3, where c is the speed of light, this model may yield a maximum value of Qγ ≍ 1053erg.

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