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    A Novel Paradigm For Short Gamma-Ray Bursts With Extended X-Ray Emission

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    Date
    2015-04
    Author
    Rezzolla, Luciano
    Kumar, Pawan
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    Abstract
    The merger of a binary of neutron stars provides natural explanations for many of the features of short gamma-ray bursts (SGRBs), such as the generation of a hot torus orbiting a rapidly rotating black hole, which can then build a magnetic jet and provide the energy reservoir to launch a relativistic outflow. However, this scenario has problems explaining the recently discovered long-term and sustained X-ray emission associated with the afterglows of a subclass of SGRBs. We propose a new model that explains how an X-ray afterglow can be sustained by the product of the merger and how the X-ray emission is produced before the corresponding emission in the gamma-band, though it is observed to follow it. Overall, our paradigm combines in a novel manner a number of well-established features of the emission in SGRBs and results from simulations. Because it involves the propagation of an ultra-relativistic outflow and its interaction with a confining medium, the paradigm also highlights a unifying phenomenology between short and long GRBs.
    Department
    Astronomy
    Subject
    gamma-ray burst: general
    stars: black holes
    stars: magnetic field
    stars: neutron
    stars: winds, outflows
    neutron-star mergers
    fast radio-bursts
    grb light curves
    black-holes
    relativistic jets
    driven winds
    collapse
    remnants
    collimation
    radiation
    astronomy & astrophysics
    URI
    http://hdl.handle.net/2152/34786
    Citation
    Rezzolla, Luciano, and Pawan Kumar. "A Novel Paradigm for Short Gamma-Ray Bursts With Extended X-Ray Emission." The Astrophysical Journal, Vol. 802, No. 2 (Mar., 2015): 95.
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    • facebook
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    • CONTACT US
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    • Emergency Information
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    • Adobe Reader
    Subscribe to our NewsletterGive to the Libraries

    © The University of Texas at Austin