A search for pulsational line variations in the delta Scuti star HD21190 and the Ap Sr star HD218994

GONZALEZ, J. F.; HUBRIG, S.; SAVANOV, I.

Viena, Austria

Workshop; CP/AP Workshop; 2007

University of Vienna

We present the results of our recent search for pulsational line profile variations in high time resolution UVES spectra of the most evolved Ap star known, the delta Scuti star HD21190, and the Ap Sr star HD218994. We found that HD218994 is an roAp star with a pulsation period of 5.1 min, which makes it the 36th star known to be a roAp star. No rapid pulsations have been found in the spectra of the delta Scuti star HD21190. However, we detect moving peaks in the cores of the spectral lines, which indicate the presence of non-radial pulsations in this star