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Radiation of strongly interacting particles by thermal sources: Violation of the Stefan-Boltzmann law

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Title: Radiation of strongly interacting particles by thermal sources: Violation of the Stefan-Boltzmann law
Author(s): Kircher, Keiko I.
Director of Research: Baym, Gordon A.
Doctoral Committee Chair(s): Thaler, Jonathan J.
Doctoral Committee Member(s): Baym, Gordon A.; Stone, Michael; Hubler, Alfred W.
Department / Program: Physics
Discipline: Physics
Degree Granting Institution: University of Illinois at Urbana-Champaign
Degree: Ph.D.
Genre: Dissertation
Subject(s): Freezeout Hawking Temperature
Abstract: This thesis discusses a gas around a thermal source that emits particles with a temperature that is high enough for the emitted particles to self-interact. Particles emitted from a hot thermal source by means of Hawking radiation could self- interact. With such strong interactions, the Stefan-Boltzmann law would not accurately describe the properties of the radiation. This thesis discusses two different regions of a strongly interacting gas around a thermal source: the region where the gas can be accurately described by a perfect fluid in a strong gravitational field, and where the gas freezes out due to an increasing mean free path. Here we show that properties of radiation would change due to self-interaction of such gas, and as the interaction weakens due to increasing mean free path of the particles, parameters of the gas change rapidly, which indicates that the gas freezes out. The temperature of self- interacting radiation becomes lower in both perfect fluid region and freezeout region. The temperature measured at infinity is lower than the temperature of non-interacting radiation approximately by a factor of two. The result shows that a thermal source surrounded by a strongly interacting gas would seem colder than when self-interaction of the particles is not taken into account, and that such strongly-interacting radiation would go through a rapid change in its parameters such as temperature and fluid velocity.
Issue Date: 2011-01-14
URI: http://hdl.handle.net/2142/18227
Rights Information: Copyright 2010 Keiko I. Kircher
Date Available in IDEALS: 2011-01-14
Date Deposited: 2010-12
 

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