EDP Sciences
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Volume 390, Number 3, August II 2002
Page(s) L39 - L42
Section Letters
DOI http://dx.doi.org/10.1051/0004-6361:20020982

A&A 390, L39-L42 (2002)
DOI: 10.1051/0004-6361:20020982



R. Ouyed1, J. Dey2 and M. Dey 3

1  Nordic Institute for Theoretical Physics, Blegdamsvej 17, DK-2100 Copenhagen, Denmark
2  Department of Physics, Maulana Azad College, Calcutta 700 013, India
3  Department of Physics, Presidency College, Calcutta 700 073, India

(Received 14 May 2002 / Accepted 1 July 2002)

We explore the scenario where the core of a neutron star (having experienced a transition to an up and down quark phase) shrinks into the equilibrated quark object after reaching strange quark matter saturation density (where a composition of up, down and strange quarks is the favored state of matter). The overlaying (envelope) material free-falls following the core contraction releasing upto $10^{53}\ {\rm ergs}$ in energy as radiation, partly as a result of the conversion of envelope material to quarks. This phenomena, we named Quark-Nova, leads to a wide variety of ejectae ranging form the Newtonian, "dirty" to the ultra-relativistic fireball. The mass range of the corresponding compact remnant (the quark star) ranges from less than $0.3~M_{\odot}$ up to a solar mass. We discuss the connection between Quark-Novae and Gamma ray bursts and suggest the recently studied GRB011211 event as a plausible Quark-Nova candidate.

Key words: dense matter -- gamma ray: bursts -- stars: interior

Offprint request: R. Ouyed, ouyed@nordita.dk

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