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The circumstellar environment of chromospherically active T Tauri stars

Published online by Cambridge University Press:  04 August 2017

U. Finkenzeller  and
G. Basri
U. Finkenzeller
Affiliation:
Astronomy Department, University of California, Berkeley, CA 94720
G. Basri
Affiliation:
Astronomy Department, University of California, Berkeley, CA 94720

Abstract

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We discuss new spectroscopic material on 7 T Tauri stars of low to intermediate activity level which have envelopes of low optical thickness and small circumstellar/interstellar extinction. We show that difference plots between the target star and appropriate standards are a powerful tool to probe the stellar envelope structure. In our sample we find 1 object with a P Cyg type, 3 with inverse P Cyg type, and 3 with symmetrical Balmer line profiles. We conclude that the physical processes in these T Tauri stars do not differ qualitatively from the ones found in extremely active ones. In particular, the inverse P Cyg type profiles are not restricted to stars with very opaque envelopes and are possibly a much more common attribute of young stellar objects.

Type
Bipolar Flows, Jets and Protostars
Information
Symposium - International Astronomical Union , Volume 122: Circumstellar Matter , 1987 , pp. 103 - 104
Copyright
Copyright © Reidel 1987 

References

Appenzeller, I., Jankovics, I., Krautter, J. 1983, Astron. Astrophys. Suppl., 53, 191 Google Scholar
Bertout, C. 1979, Astron. Astrophys., 80, 139 Google Scholar
Finkenzeller, U., Basri, G. 1985, The ESO Messenger, 42, 20 Google Scholar
Ulrich, R., Knapp, G. 1985, preprint Google Scholar