Searching for the Long-Duration Gamma-Ray Burst Progenitor

Nominated as an outstanding thesis by the Department of Physics and Astronomy of the University of New Mexico, this thesis seeks to identify the gamma-ray burst (GRB) progenitor.  GRBs are extragalactic explosions that briefly outshine entire galaxies, but the mechanism that can release that much en...

Πλήρης περιγραφή

Λεπτομέρειες βιβλιογραφικής εγγραφής
Κύριος συγγραφέας: Mesler III, Robert Allan (Συγγραφέας)
Συγγραφή απο Οργανισμό/Αρχή: SpringerLink (Online service)
Μορφή: Ηλεκτρονική πηγή Ηλ. βιβλίο
Γλώσσα:English
Έκδοση: Cham : Springer International Publishing : Imprint: Springer, 2014.
Σειρά:Springer Theses, Recognizing Outstanding Ph.D. Research,
Θέματα:
Διαθέσιμο Online:Full Text via HEAL-Link
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245 1 0 |a Searching for the Long-Duration Gamma-Ray Burst Progenitor  |h [electronic resource] /  |c by Robert Allan Mesler III. 
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505 0 |a Introduction -- Gamma-ray Bursts in Circumstellar Shells -- Population III Gamma-ray Bursts -- VLBI and Archival VLA and WSRT Observations of GRB 030329 -- Calorimetry of GRB 030329 -- Conclusions -- Appendices. 
520 |a Nominated as an outstanding thesis by the Department of Physics and Astronomy of the University of New Mexico, this thesis seeks to identify the gamma-ray burst (GRB) progenitor.  GRBs are extragalactic explosions that briefly outshine entire galaxies, but the mechanism that can release that much energy over a < 100 second burst is still a mystery.  The leading candidate for the GRB progenitor is currently a massive star which collapses to form a black hole–accretion disk system that powers the GRB.  GRB afterglows, however, do not always show the expected behavior of a relativistic blast wave interacting with the stellar wind that such a progenitor should have produced before its collapse. In this book, the author uses the Zeus-MP astrophysical hydrodynamics code to model the environment around a stellar progenitor prior to the burst.  He then develops a new semi-analytic MHD and emission model to produce light curves for GRBs encountering these realistic density profiles.  The work ultimately shows that the circumburst medium surrounding a GRB at the time of the explosion is much more complex than a pure wind, and that observed afterglows are entirely consistent with a large subset of proposed stellar progenitors. 
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