A Statistical Analysis of Emission-Line Members of the Orion Population.
NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF
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A statistical analysis of the Second Catalog of Emission-Line Stars of the Orion Population was undertaken. After the reduction of the Catalog to numeric data, statistics and frequency distributions were systematically searched for any physically significant characteristics. Those two-way frequency distributions with possible physical significance were analyzed. Distance moduli for 228 stars were tabulated. Hertzsprung-Russell diagrams were plotted. The T Tauri stars, so plotted, lie between the main sequence and giant branch. A lack of correlation between the large scale variability and any other set of observed characteristics was discovered. Present theories of stellar evolution do not explain this lack of correlation nor the cause of the variability. It is argued, that on the basis of current data, no conclusion can be reached as to whether T Tauri stars are on convective or radiative equilibrium tracks approaching the main sequence. A luminosity function for the Orion Population is presented and is found to be significantly different than the solar neighborhood luminosity function. Author
- Atomic and Molecular Physics and Spectroscopy