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Line Variability in 33 Gem?

Published online by Cambridge University Press:  12 April 2016

Swetlana Hubrig  and
Rainer Launhardt
Swetlana Hubrig
Affiliation:
University of Potsdam, Neues Palais, 0-1570, Potsdam, Germany
Rainer Launhardt
Affiliation:
University of Jena, Schillergässchen 2, 0-6900 Jena, Germany

Abstract

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The spectrum of 33 Gem exhibits a great similarity with that of a CP3 star, but in contrast to other members of this group, light variations and variability in helium lines were reported. Even an effective magnetic field strength up to 1.4 kG was measured in the lines of elements He I, Si n, P H, Mg II, Ti H, Mn II, Fe H (Glagolevskij et al., 1985). For these far-reaching differences high resolution (R≃ 40000), high signal-to-noise (> 100) CCD spectra of 33 Gem were observed with the Coudé spectrograph of 2.2 m telescope at Calar Alto. As well for the profiles of the He I lines as for those of the metallic lines no changes could be found. Our rough inspection of Zeeman spectograms taken with the 6 m telescope at Zelenschuk in which Glagolevskij et al. noticed a magnetic field revealed unexpected splitting of several lines into two components probably caused by a companion. The line components are separated approximately by 0.1 Å. For this splitting a confirmation of the presence of a magnetic field was difficult.

Type
III. Magnetic Versus Non-Magnetic Stars
Information
International Astronomical Union Colloquium , Volume 138: Peculiar versus Normal Phenomena in A-Type and Related Stars , 1993 , pp. 350 - 355
Copyright
Copyright © Astronomical Society of the Pacific 1993

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