The Hvar survey for roAp stars. II. Final results
- Author(s)
- Ernst Paunzen, Martin Netopil, Monika Rode-Paunzen, Gerald Handler, Hrvoje Bozic
- Abstract
Context: 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.
Aims: We attempt to increase the number of known chemically peculiar stars that are known to be pulsationally unstable.
Methods: About 40 h of new CCD photometric data of 21 roAp candidates, observed at the 1 m Austrian-Croatian Telescope (Hvar Observatory) are presented. We carefully analysed these to search for pulsations in the frequency range of up to 10 mHz.
Results: 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.
Conclusions: In addition to photometric observations, we need to consolidate spectroscopic information to select suitable targets.- Organisation(s)
- Department of Astrophysics
- External organisation(s)
- Masaryk University, Polish Academy of Sciences (PAS), University of Zagreb
- Journal
- Astronomy & Astrophysics
- Volume
- 575
- No. of pages
- 7
- ISSN
- 0004-6361
- DOI
- https://doi.org/10.1051/0004-6361/201425281
- Publication date
- 03-2015
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103003 Astronomy, 103004 Astrophysics
- Keywords
- ASJC Scopus subject areas
- Astronomy and Astrophysics, Space and Planetary Science
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/the-hvar-survey-for-roap-stars-ii-final-results(a2adeaec-74ee-4abb-9d25-c0355fdb0354).html