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Spectroscopic diagnostics of T Tauri inner winds

Published online by Cambridge University Press:  01 May 2007

Suzan Edwards
Suzan Edwards*
Affiliation:
Department of Astronomy, Smith College, Northampton, MA 01063, USA email: sedwards@smith.edu
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Abstract

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The role of the star-disk interaction region in launching the high velocity component of accretion-driven outflows is examined. Spectroscopic indicators of high velocity inner winds have been recognized in T Tauri stars for decades, but identifying the wind launch site and the accompanying mass loss rates has remained elusive. A promising new diagnostic is He I λ10830, whose metastable lower level results in a powerful probe of the geometry of the outflowing gas in the interaction region. This, together with other atomic and molecular spectral diagnostics covering a wide range of excitation and ionization states, suggests that more than one launch site of the innermost wind is operational in most accreting stars.

Keywords

Stars:pre–main-sequencemass losswindsoutflows
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S243: Star-Disk Interaction in Young Stars , May 2007 , pp. 171 - 182
Copyright
Copyright © International Astronomical Union 2007

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