The spectroscopic signature of roAp stars

Author(s)
Tanya A. Ryabchikova, Nicole Nesvacil, Werner Wolfgang Weiss, Oleg Kochukhov, Christian Stütz
Abstract

To reliably determine the spectroscopic signature of rapidly oscillating chemically peculiar (roAp) stars it is also necessary to investigate a sample of non pulsating chemically peculiar (noAp) as well as presumably "normal" stars. We describe in this study the sample of spectroscopically investigated stars and comment on the techniques used for the analysis. In particular we discuss ionization disequilibria of rare earths in roAp stars that distinguish them from noAp stars. In the light of the recently discovered pulsation of ß CrB we see arguments that all magnetic CP2 stars up to a transition temperature of about 8100 K may be pulsating.

Organisation(s)
Department of Astrophysics
External organisation(s)
Russian Academy of Sciences, Uppsala University, European Southern Observatory (Chile)
Journal
Astronomy & Astrophysics
Volume
423
Pages
705-715
No. of pages
11
ISSN
0004-6361
DOI
https://doi.org/10.1051/0004-6361:20041012
Publication date
2004
Peer reviewed
Yes
Austrian Fields of Science 2012
103003 Astronomy
Portal url
https://ucrisportal.univie.ac.at/en/publications/d5722839-2428-43b9-8b5a-f633ac2ebf62