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The circumstellar environment of chromospherically active T Tauri stars

Published online by Cambridge University Press:  04 August 2017

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
Copyright
Copyright © Reidel 1987 

References

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Ulrich, R., Knapp, G. 1985, preprint Google Scholar