Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 2 of 2
Full-Text Articles in Physical Sciences and Mathematics
Study The Mechanism Of The Prompt Emission Of Gamma-Ray Bursts, Wei Deng
Study The Mechanism Of The Prompt Emission Of Gamma-Ray Bursts, Wei Deng
UNLV Theses, Dissertations, Professional Papers, and Capstones
The prompt emission of Gamma-Ray Bursts (GRBs) has been detected over 40 years, but the mechanism of the prompt emission is still a mystery. The problem can be summarized as several debatable questions: What is the energy composition of the jets/outflows? What is the energy dissipation mechanism? How are the particles accelerated during the energy dissipation process? What is the radiation mechanism to produce the observed prompt emission? In order to solve these problems, several theoretical models have been proposed, including the classical "internal shock (IS)" model, the "dissipative photosphere" model, the "magnetic dissipation" model, and so on. Different models …
Constraining The Progenitor And Central Engine Of Gamma-Ray Bursts With Observational Data, Lu Houjun
Constraining The Progenitor And Central Engine Of Gamma-Ray Bursts With Observational Data, Lu Houjun
UNLV Theses, Dissertations, Professional Papers, and Capstones
Gamma-ray bursts (GRBs) are extremely energetic explosions at cosmological distances. We have made great progress in understanding the mysteries of these events since they were discovered more than forty years ago. However, some open questions still remain, e.g. how many classes of GRBs are there, what are the progenitors of these classes, and what is the central engine powering these huge explosions? Thanks to the NASA missions Swift and Fermi, which are used to detect the multi-wavelength emission from these transients, our understanding of GRBs has been greatly advanced. In this dissertation, I use multi-wavelength data to constrain the progenitor …