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UBC Theses and Dissertations

Improved method of determining the component separation of blended spectral lines. Olson, Bernt Ingemar


An automated method of determining the relative line separations on digitized blended stellar spectra has been developed. A pair of standard profiles are fitted to the observed blended profile by allowing the standards to relax in position and amplitude until a least-square 'best fit' is obtained. The technique has been tested on numerous blends of known separation and it has been shown that with certain restrictions on the relative amplitudes it is not susceptible to systematic errors. Blended hydrogen and helium lines in two B-stars have been separated to < 100 km/sec at 30 A/mm with a probable error of 15 km/sec.

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