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Time-Resolved High-Resolution Spectroscopy of roAp Stars1

Published online by Cambridge University Press:  12 April 2016

O. Kochukhov  and
T. Ryabchikova
O. Kochukhov
Affiliation:
Uppsala Astronomical Observatory, Sweden
T. Ryabchikova
Affiliation:
Institute of Astronomy, Russian Academy of Sciences, Moscow, Russia Institute for Astronomy, University of Vienna, Austria

Abstract

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We report results of Spectroscopic monitoring of the roAp stars γ Equ, α Cir and HR 3831 with the ESO 3.6-meter telescope. Series of very high-resolution and high S/N spectra allowed to resolve changes of line profiles due to the pulsations. We found that pulsational behaviour of all three roAp stars is dominated by the variations of the doubly ionized rare-earth lines. Detailed analysis of the pulsational changes of Nd III and Pr III spectral features allowed us to identify the pulsational mode of γ Equ and to study rotational modulation of the pulsational pattern in the spectra of α Cir and HR 3831.

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. 284 - 287
Copyright
Copyright © Astronomical Society of the Pacific 2002

Footnotes

1

Based on observations obtained at the European Southern Observatory (La Silla, Chile)

References

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