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Time-resolved high-resolution spectroscopy of the bright sdBV Balloon090100001 John Telting et al., Bamberg, July 2007 |
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For the mode-identification we use the model of Schrijvers & Telting (1998) to compute pulsational line-profile variations. For the simple fits we present below, we only account for the pulsational velocity field, and neglect the effects of temperature variations.
We fit the observables that are best determined: the radial-velocity amplitude and the mean line profile.
Strategy 1: for each mode tune the
pulsational velocity amplitude to give an observable
line-centroid radial-velocity of 15 km/s. The inclination
is optimised for lowest pulsational velocity.
Strategy 2: the Gaussian line broadening
is optimised to fit the average spectrum.