2026-09-22T01:06:00Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/18227 2023-07-10 col_2142_5131 col_2142_8859 com_2142_5130 com_2142_8858 com_2142_234

Baym, Gordon A. Thaler, Jonathan J. Baym, Gordon A. Stone, Michael Hubler, Alfred W. Kircher, Keiko I. 2011-01-14T22:40:34Z 2011-01-14T22:40:34Z 2011-01-14T22:40:34Z 2010-12 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. Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2010-08-23T13:48:02Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 1 Kircher_Keiko.pdf: 482808 bytes, checksum: 4cc063f976cdfa75a3913de544d3e6ae (MD5) Made available in DSpace on 2011-01-14T22:40:34Z (GMT). No. of bitstreams: 2 Kircher_Keiko.pdf: 482806 bytes, checksum: df95a65da52dc5292b632b41f7dc966d (MD5) license.txt: 4063 bytes, checksum: 7727456d34bec49d2cc6f296f09d492c (MD5) http://hdl.handle.net/2142/18227 en Copyright 2010 Keiko I. Kircher Freezeout Hawking Temperature Radiation of strongly interacting particles by thermal sources: Violation of the Stefan-Boltzmann law Physics 1244 Physics 0240 University of Illinois at Urbana-Champaign Dissertation Ph.D. PHD:Physics -UIUC 10KS0240PHD