Publication details

The Hvar survey for roAp stars II. Final results

Authors

PAUNZEN Ernst NETOPIL Martin RODE-PAUNZEN Monika HANDLER Gerald BOZIC Hrvoje

Year of publication 2015
Type Article in Periodical
Magazine / Source ASTRONOMY & ASTROPHYSICS
MU Faculty or unit

Faculty of Science

Citation
Doi http://dx.doi.org/10.1051/0004-6361/201425281
Field Astronomy and astrophysics
Keywords stars: chemically peculiar; stars: variables: general
Description The 60 known rapidly oscillating Ap (roAp) stars are excellent laboratories to test pulsation models in the presence of stellar magnetic fields. Our survey is dedicated to search for new group members in the northern hemisphere. We attempt to increase the number of known chemically peculiar stars that are known to be pulsationally unstable. About 40 h of new CCD photometric data of 21 roAp candidates, observed at the 1m Austrian-Croatian Telescope (Hvar Observatory) are presented. We carefully analysed these to search for pulsations in the frequency range of up to 10mHz. No new roAp star was detected among the observed targets. The distribution of the upper limits for roAp-like variations is similar to that of previoius similar efforts using photomultipliers and comparable telescope sizes. In addition to photometric observations, we need to consolidate spectroscopic information to select suitable targets.
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