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Looking for Twins of Przybylski’s Star

Published online by Cambridge University Press:  12 April 2016

S. Hubrig ,
C.R. Cowley ,
S. Bagnulo ,
G. Mathys ,
A. Ritter  and
G.M. Wahlgren
S. Hubrig
Affiliation:
European Southern Observatory, Casilla 19001, Santiago 19, Chile
C.R. Cowley
Affiliation:
Astronomy Department, University of Michigan, Ann Arbor, MI 48109-1090, USA
S. Bagnulo
Affiliation:
European Southern Observatory, Casilla 19001, Santiago 19, Chile
G. Mathys
Affiliation:
European Southern Observatory, Casilla 19001, Santiago 19, Chile
A. Ritter
Affiliation:
Astrophysikalisches Institut Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany
G.M. Wahlgren
Affiliation:
Atomic Astrophysics, Lund Observatory, Box 43, 22100 Lund, Sweden

Abstract

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The examination of high resolution spectra of two Ap stars, HD 965 and HD 217522, discloses a spectral appearance similar to Przybylski’s star. Here we present the preliminary results of a comparative study of all three stars. Further, we discuss the possibility of having a good spectroscopic indicator of magnetic fields in Ap stars. In all three studied stars the strong Lu II line at λ 5984 Å is present and very likely not affected by significant blends. Its hyperfine structure has been recently measured and we show the results of a model that accounts for the Paschen-Back effect on hyperfine structure.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 187: Exotic Stars as Challenges to Evolution , 2002 , pp. 365 - 372
Copyright
Copyright © Astronomical Society of the Pacific 2002

References

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