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Simultaneous Spectroscopic and Photometric Observations of the YY Orionis Star S CrA*

Published online by Cambridge University Press:  12 April 2016

R. Mundt  and
B. Wolf
R. Mundt
Affiliation:
Landessternwarte Königstuhl, 6900 Heidelberg, Federal Republic Germany
B. Wolf
Affiliation:
Landessternwarte Königstuhl, 6900 Heidelberg, Federal Republic Germany

Abstract

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The YY Orionis stars are a subclass of the T Tauri stars which show in their spectra evidence for infailing envelopes. They are interpreted as protostars in the final stages of their hydrodynamical evolution (Walker 1972, Appenzeller and Wolf 1977, Wolf et al. 1977).

To get more information about the behaviour of these highly variable stars simultaneous spectroscopic and photoelectric (UBV) observations have been carried out in July 1977 at the ESO observatory at La Silla. Such observations of YY Orionis stars have never been done before.

The most frequently observed star during our run was the bright YY Orionis star S CrA. The observational material is still under evaluation and therefore only some preliminary results are presented here. A more extended description and discussion of the observations will be published elsewhere (Mundt and Wolf, 1977).

Type
Part I: Young Objects
Information
International Astronomical Union Colloquium , Volume 42: The Interaction of Variable Stars with their Environment , 1977 , pp. 88 - 91
Copyright
Copyright © Veröff. Der Remeis-Sterwarte 1977

Footnotes

*

Based on observations collected at the European Southern Observatory, Chile.

References

Anderson, I., Kuhi, L.V.: 1968, Non-Periodic Phenomena in Variable Stars, IAU Colloquium Budapest, ed. Detre, D. Eeidel Publ.Comp. Dordrecht-Holland Google Scholar
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Wolf, B., Appenzeller, I., Bertout, C.: 1977, Astron.Astrophys. 58, 163.Google Scholar