High azimuthal number pulsation modes in fast rotating Scuti stars: the case of HD 101158 V837 Cen *
Received 18 March 1996 / Accepted 13 September 1996
The frequency analysis of the line profile variations of the fast rotating Scuti star HD 101158, observed for three consecutive nights, shows the presence of two high azimuthal number non radial pulsation modes. The star is probably seen almost equator-on and both modes c/d and c/d) are prograde with and or -15 respectively; their frequencies are different with respect to the three frequencies identified in photometric data (Poretti 1991), which probably owe due to low modes. Indications of the presence of these photometric modes have been found from the frequency analysis of the first two line moments. The line profile variations also show the possible presence of further modes with frequencies of 16.2, 20.3 and 21.1 c/d and small amplitudes.
Key words: data analysis spectroscopy stars: ffi Sct stars: individual: HD 101158 stars: oscillation of
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© European Southern Observatory (ESO) 1997
Online publication: May 26, 1998