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2007MNRAS.381.1647V - Mon. Not. R. Astron. Soc., 381, 1647-1654 (2007/November-2)
A spectroscopic search for non-radial pulsations in the δ Scuti star γ Bootis.
VENTURA R., CATANZARO G., CHRISTENSEN-DALSGAARD J., DI MAURO M.P. and PATERNO L.
Abstract (from CDS):
The results confirm the early detection reported by Kennelly et al. of a dominant periodic component at frequency 21.28 cycles/d in the observer's frame, probably due to a high-azimuthal-order sectorial mode. Moreover, we found other periodicities at 5.06, 12.02cycles/d, probably present but not secure, and at 11.70 and 18.09cycles/d, uncertain. The latter frequency, if present, should be identifiable as another high-azimuthal-order sectorial mode and the three additional terms as low-l modes as proved by the analysis of the first three moments of the line. Owing to the short time baseline and the one-site temporal sampling we consider our results only preliminary but encouraging for a more extensive multisite campaign.
A refinement of the atmospheric physical parameters of the star has been obtained from our spectroscopic data and adopted for preliminary computations of evolutionary models of γ Bootis.
Abstract Copyright: 2007 The Authors. Journal compilation © 2007 RAS
Journal keyword(s): stars: individual: γ Bootis - stars: individual: HD127762 - stars: oscillations - δScuti
Simbad objects: 1
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