Quark-nova explosion inside a collapsar

application to gamma ray bursts

Rachid Ouyed, Denis Leahy, Jan Staff, Brian Niebergal

Research output: Contribution to journalArticle

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 (Γ ∼ 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, γ-ray), (ii) prompt γ-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 γ-ray prompt emission observed in GRBs in the context of our model.
Original languageEnglish
Pages (from-to)1-10
Number of pages10
JournalAdvances in Astronomy
Volume2
DOIs
Publication statusPublished - 2009
Externally publishedYes

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