Quote:
Originally Posted by robin_astro
the maximum shift from quadrature to eclipse (if total) would be 100km/s or 0.2nm at 600nm. Because the eclipse is partial though the shift in the line centre will be less than that.
|
Scrub that. If the two stars are the same luminosity, there will be no shift in the line centre of the blended lines (which will always be the case at Star Analyser resolution) at any phase, independent of what happens at eclipse. Shifts with phase would only be seen due to differences in luminosity between the two stars and would be less than +-100km/s. The best times to see this would be by comparing spectra taken at the two quadrature positions. I think you will still need something with higher resolution than the Star Analyser to see anything though.
Robin