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GAMMA RAY BURSTS AND DELAYED QUARK-DECONFINEMENT

  • Conference paper
Book cover Superdense QCD Matter and Compact Stars

Part of the book series: NATO Science Series II: Mathematics, Physics and Chemistry ((NAII,volume 197))

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Abstract

We describe a new model, proposed by Berezhiani et al. (2003), which is able to explain how a gamma-ray burst (GRB) can take place days or years after a supernova explosion. We show that above a threshold value of the gravitational mass a pure hadronic star (“neutron star”) is metastable to the conversion into a quark star (hybrid star or strange star), i.e. a star made at least in part of decon-fined quark matter. The stellar conversion process can be delayed if finite size effects at the interface between hadronic and deconfined quark matter phases are taken into account. A huge amount of energy, on the order of 1052 − 1053 ergs, is released during the conversion process and can produce a powerful gammaray burst. The delay between the supernova explosion generating the metastable neutron star and the new collapse can explain the delay inferred in GRB 990705 and in GRB 011211. Next, we explore the consequences of the metastability of “massive” neutron stars and of the existence of stable compact quark stars on the concept of limiting mass of compact stars. Finally, we discuss the implications of the present scenario on the interpretation of the stellar mass and radius extracted from the spectra of several X-ray compact sources.

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Author information

Authors and Affiliations

  1. Dipartimento di Fisica “E. Fermi”, Universita‘ di Pisa & INFN, Sezione di Pisa, via Buonarroti, 2, I-56127, Pisa, Italy

    Ignazio Bombaci, Irene Parenti & Isaac Vidaña

Authors
  1. Ignazio Bombaci
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  2. Irene Parenti
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  3. Isaac Vidaña
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Editor information

Editors and Affiliations

  1. Rostock University,Germany and JINR Dubna, Russia

    David Blaschke

  2. Yerevan State University, Armenia

    David Sedrakian

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Bombaci, I., Parenti, I., Vidaña, I. (2006). GAMMA RAY BURSTS AND DELAYED QUARK-DECONFINEMENT. In: Blaschke, D., Sedrakian, D. (eds) Superdense QCD Matter and Compact Stars. NATO Science Series II: Mathematics, Physics and Chemistry, vol 197. Springer, Dordrecht. https://doi.org/10.1007/1-4020-3430-X_21

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