Astron. Astrophys. 333, 644-646 (1998)

The Ap star HD 83368 may be a lithium-spotted pulsator ^*

P. North ¹, N. Polosukhina ², V. Malanushenko ² and M. Hack <sup>3

1</sup> Institut d'Astronomie de l'Université de Lausanne, CH-1290 Chavannes-de-Bois, Switzerland (pierre.north@obs.unige.ch)
² Crimean Astrophysical Observatory Nauchny, Crimea, Ukraine (polo@crao.crimea.ua)
³ Dipartimento di Astronomia dell'Università degli Studi di Trieste, Trieste, Italy (hack@astrts.oat.ts.astro.it)

Received 12 November 1997 / Accepted 6 February 1998

Abstract

Several observations of some Ap stars have been made at the ESO, Nordic and Crimean telescopes in 1996. Interesting results have been found for the roAp star HD 83368 = HR 3831 in the Li spectral region. These have shown the presence of two almost diametrically opposed spots of Li or of the element responsible for the "Li" blend, which cause strong variations in the profile and position of the Li blend at 6708 Å.

Key words: stars: individual: HD 83368 stars: chemically peculiar starspots

* Based on observations collected at the European Southern Observatory, La Silla, Chile

Send offprint requests to: M. Hack

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Contents

• 1. Introduction
• 2. Observations
• 3. Results and discussion
• 4. Conclusion
• Acknowledgements
• References

© European Southern Observatory (ESO) 1998

Online publication: April 20, 1998
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