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Searching for the Long-Duration Gamma-Ray Burst Progenitor / by Robert Allan Mesler III.
Resource type: Ressourcentyp: Buch (Online)Book (Online)Language: English Series: Springer Theses, Recognizing Outstanding Ph.D. Research | SpringerLink BücherPublisher: Cham ; s.l. : Springer International Publishing, 2014Description: Online-Ressource (XIII, 111 p. 25 illus., 21 illus. in color, online resource)ISBN:- 9783319066264
- 520
- 500.5
- QB495-500.269
Contents:
Summary: 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 progenitorsPPN: PPN: 1657962652Package identifier: Produktsigel: ZDB-2-PHA
IntroductionGamma-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.
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