Doppler mapping of four roAp stars with anomalous lithium abundance
Abstract
We present the first results from Doppler Imaging of two roAp stars, HD 12098 and HD 60435, that show strong and variable Li lines in their spectra. High-resolution spectra were obtained with the Russian 6-m BTA telescope, and with the HARPS and VLT/UVES instruments at ESO. We derived the surface abundance distribution of Li and Pr and analysed the correlation between the positions of the Li-abundance spots and magnetic field. We compare our results with Doppler Imaging mapping previously obtained for two CP2 stars, HD 83668 and HD 3980, and discuss the common properties of the locations of the ``Li spots'' on the surfaces of magnetic chemically peculiar A-type stars.
- Publication:
-
Putting A Stars into Context: Evolution, Environment, and Related Stars
- Pub Date:
- November 2014
- Bibcode:
- 2014psce.conf..166P