X and Ultraviolet Radiation From Accreting Non-Magnetic Degenerate Dwarfs: A Two-Fluid Treatment of the Emission Region and the Effects of Steady Nuclear Burning

The first main chapter is a report of the results of calculations which^allow the temperatures of the electrons and the ions to differ and which^include electron thermal conduction. The calculation is done in spherical^geometry, with cooling by bremsstrahlung and cooling by the inverse^Compton effect added in the post shock emission region. Our two-fluid^calculations are needed only in the small region bounded by M(, )>(, )1.2^M(,(CIRCLE)) and M(, )>(, )5 x 10('-3) M(,E), where M(,E) is the Eddington accretion rate^at which gravitational and radiation pressure forces balance (M(,E) = 5.57^x 10('20)(R/5 x 10('8)) g s('-1)). When there is steady nuclear burning at the accretion rate, Compton cooling is enhanced and two-fluid effects are important for M(, )>(, )1.0 M(,(CIRCLE)) and accretion rates M(' )>(, )10('-4) M(,E).

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Physics

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2015

Author dc:creator

• Weast, Gordon John

• Physics, Astronomy and Astrophysics

Language dc:language

eng

Identifier

(UMI)AAI8114496

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/77203