Spectroscopic study of the pulsations in the roAp star HD 24712

Details Spectroscopic study of the pulsations in the roAp star HD 24712 Spectroscopic study of the pulsations in the roAp star HD 24712

Jan 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006coast.147...97s&link_type=abstract

Communications in Asteroseismology, vol. 147, p. 97-100

Physics

3

Scientific paper

We present results of the radial velocity (RV) analysis of spectroscopic time-series observations of the roAp star HD 24712 (HR 1217). Only lines of the rare-earth elements (REE) show substantial amplitudes in the RV data. The progressive change of the RV pulsation phase with the optical depth for lines of the same element gives strong evidence for a running wave. The surface abundance distribution should be taking into account in interpreting of the phase shifts between the RV curves for different elements. We did not find phase jumps at the magnetic field extrema reported earlier by Mkrtichian & Hatzes (2005).

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