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Author Shaposhnikov, Nickolai
Title Bursting neutron stars: Spectral formation theory and its application to mass and radius determination
book jacket
Descript 142 p
Note Source: Dissertation Abstracts International, Volume: 65-03, Section: B, page: 1366
Director: Lev Titarchuk
Thesis (Ph.D.)--George Mason University, 2004
The processes of spectral formation in the atmosphere of neutron star during Type I X-ray burst is considered in detail. Separate treatment is presented for expansion and decay stages. Special effort is made to develop self-consistent models, applicable for data analysis. All crucial physical factors are accounted for including Comptonization, free-free absorption and emission. Newton gravity is assumed. Analytical expressions are provided for color temperature hardening/softening factors. Spectral shapes are presented as functions of input parameters, i.e. neutron star mass and radius, chemical conmposition of an atmosphere and source distance. Models are applied to observational data in order to constrain neutron star mass-radius relation. X-ray burst data for bursters 4U 1728--34, 4U 1820--30, Cygnus X-2, EXO 0748--676 and GS 1826--24 collected by Rossi X-ray Timing Explorer is used
School code: 0883
Host Item Dissertation Abstracts International 65-03B
Subject Physics, Astronomy and Astrophysics
Alt Author George Mason University
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