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Efficient acceleration and radiation in Poynting flux powered GRB outflows

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arxiv astro-ph/0202387 v2 pith:6A3BLV3G submitted 2002-02-21 astro-ph

classification astro-ph
keywords dissipationenergyradiationmagneticbaryoneffectsefficiencyloading
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We investigate the effects of magnetic energy release by local magnetic dissipation processes in Poynting flux-powered GRBs. For typical GRB parameters (energy and baryon loading) the dissipation takes place mainly outside the photosphere, producing non-thermal radiation. This process converts the total burst energy into prompt radiation at an efficiency of 10-50%. At the same time the dissipation has the effect of accelerating the flow to a large Lorentz factor. For higher baryon loading, the dissipation takes place mostly inside the photosphere, the efficiency of conversion of magnetic energy into radiation is lower, and an X-ray flash results instead of a GRB. We demonstrate these effects with numerical one-dimensional steady relativistic MHD calculations.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Inductive acceleration of ions in Poynting-flux dominated outflows

    astro-ph.HE 2019-08 accept novelty 6.0 of 10

    Adding ions to a magnetized relativistic wind lets inductive acceleration push both ions and leptons to Hillas-limit energies in a shorter distance than lepton-only winds.

  2. Gamma-ray bursts: what do we know today that we did not know 10 years ago?

    astro-ph.HE 2024-12 unverdicted

    A review of the past decade of gamma-ray burst research, highlighting structured jets, GR-MHD simulations, TeV detections, and the contested idea that many GRBs have moderate Lorentz factors.

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