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Spectroscopy of Rapidly Oscillating Ap Stars

Published online by Cambridge University Press:  12 April 2016

W.W. Weiss ,
T.A. Ryabchikova ,
I. Savanov ,
N. Piskunov ,
V. Tsymbal ,
P. Mittermayer ,
P. Martinez ,
O. Kochukhov  and
N. Nesvacil
W.W. Weiss
Affiliation:
Institute for Astronomy, Univ. Vienna, Türkenschanzstrasse 17, A-1180 Vienna, Austria ([email protected])
T.A. Ryabchikova
Affiliation:
Institute for Astronomy, Univ. Vienna, Türkenschanzstrasse 17, A-1180 Vienna, Austria ([email protected]) Institute of Astronomy, Russ. Acad. Sciences, Moscow, Russia ([email protected])
I. Savanov
Affiliation:
Crimean Astrophysical Observatory, c/o 334413 Nauchny, Crimea, Ukraine ([email protected])
N. Piskunov
Affiliation:
Uppsala Astronomical Observatory, S-751 20 Uppsala, Sweden ([email protected])
V. Tsymbal
Affiliation:
Tavrian National University, Physics Dept., 950000 Crimea, Ukraine ([email protected])
P. Mittermayer
Affiliation:
Institute for Astronomy, Univ. Vienna, Türkenschanzstrasse 17, A-1180 Vienna, Austria ([email protected])
P. Martinez
Affiliation:
South African Astronomical Observatory, P.O. Box 9, Observatory 7935, South Africa ([email protected])
O. Kochukhov
Affiliation:
Uppsala Astronomical Observatory, S-751 20 Uppsala, Sweden ([email protected])
N. Nesvacil
Affiliation:
Institute for Astronomy, Univ. Vienna, Türkenschanzstrasse 17, A-1180 Vienna, Austria ([email protected])

Abstract

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We identify Spectroscopic differences between roAp stars and Ap stars with no observational evidence for pulsation, but with otherwise similar Teff and log g values. These differences concern the abundance pattern, Hydrogen line profile anomalies, evidence for stratification, and effects of pulsation on spectral lines.

Type
Part 2.3. Chemically Peculiar Stars
Information
International Astronomical Union Colloquium , Volume 185: Radial and Nonradial Pulsations as Probes of Stellar Physics , 2002 , pp. 280 - 283
Copyright
Copyright © Astronomical Society of the Pacific 2002

References

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Ryabchikova, T., Savanov, I.S., Hatzes, A.R., Weiss, W.W., & Handler, G., 2000, A&A, 357, 981 Google Scholar