Quark-Nova Explosion inside a Collapsar: Application to Gamma Ray Bursts
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2009-06-07
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Abstract
If a quark-nova occurs inside a collapsar, the interaction between the quark-nova ejecta (relativistic iron-rich chunks) and the collapsar envelope leads to features indicative of those observed in Gamma Ray Bursts. The quark-nova ejecta collides with the stellar envelope creating an outward moving cap ( 1–10) above the polar funnel. Prompt gamma-ray burst emission from internal shocks in relativistic jets (following accretion onto the quark star) becomes visible after the cap becomes optically thin. Model features include (i) precursor activity (optical, X-ray, -ray), (ii) prompt -ray emission, and (iii) afterglow emission. We discuss SN-less long duration GRBs, short hard GRBs (including association and nonassociation with star forming regions), dark GRBs, the energetic X-ray flares detected in Swift GRBs, and the near-simultaneous optical and -ray prompt emission observed in GRBs in the context of our model.
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Rachid Ouyed, Denis Leahy, Jan Staff, and Brian Niebergal, “Quark-Nova Explosion inside a Collapsar: Application to Gamma Ray Bursts,” Advances in Astronomy, vol. 2009, Article ID 463521, 10 pages, 2009. doi:10.1155/2009/463521