Physics
Scientific paper
Oct 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996phdt........24v&link_type=abstract
Ph.D. Thesis, Univ. Wyoming, Laramie, 1996.
Physics
Infrared: Stars, Stars: Fundamental Parameters, Stars: Late-Type, Techniques:Interferometric, Stars: Carbon, Stars: Variables: Mira
Scientific paper
This dissertation describes (i) development of hardware and software for the Infrared Optical Telescope Array (IOTA) interferometer, (ii) use of IOTA to study highly evolved stars. IOTA is a two telescope Michelson stellar interferometer capable of measuring the angular sizes of bright stars down to 4.5 milliarcseconds. During the course of the dissertation research, angular diameters were obtained for over 80 stars in late stages of stellar evolution, such as giants, supergiants, carbon stars and Mira variables. From these diameters, effective temperatures and linear sizes were calculated for oxygen-rich, S-type and carbon stars, for both Mira variables and non-Miras. For oxygen-rich giants and carbon stars, the effective temperatures were correlated with spectral types. For oxygen-rich Mira variables, the periodic behavior of their linear sizes and effective temperatures was established. Utilization of these basic parameters opened the door to more complicated investigations of stellar physics, including: oxygen-rich Mira variable pulsation mode, and relative mass loss rates between the chemical abundance types.
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