The spectroscopic signature of roAp stars

Autor(en)
Tanya A. Ryabchikova, Nicole Nesvacil, Werner Wolfgang Weiss, Oleg Kochukhov, Christian Stütz
Abstrakt

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(en)
Institut für Astrophysik
Externe Organisation(en)
Russian Academy of Sciences, Uppsala University, European Southern Observatory (Chile)
Journal
Astronomy & Astrophysics
Band
423
Seiten
705-715
Anzahl der Seiten
11
ISSN
0004-6361
DOI
https://doi.org/10.1051/0004-6361:20041012
Publikationsdatum
2004
Peer-reviewed
Ja
ÖFOS 2012
103003 Astronomie
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/d5722839-2428-43b9-8b5a-f633ac2ebf62