POSTER PAPER 3.06
Time Series Spectropolarimetry of T Tauri Stars
Jeff A. Valenti, Christopher M. Johns--Krull, Artie P. Hatzes
Institute: Space Telescope Science Institute
Institute: Rice University
Institute: Thuringer Landessternwarte Tautenburg
Contact Email: valenti@stsci.edu
Abstract:
We present 6 nights of spectropolarimetry and simultaneous photometry
for the T Tauri stars AA Tau, BP Tau, DF Tau, and DK Tau. We determine
net longitudinal magnetic field globally using photospheric absorption
lines and in accretion zones using the 5876 A He I line. We
compare changes in magnetic field, broad band photometry, absorption
line depths (veiling), line profile morphology, emission line strength,
velocity shifts, and line asymmetry. The data constrain magnetic and
accretion geometry.
Index Keywords: AA Tau; BP Tau; DF Tau; DK Tau; T Tauri Stars; Accretion; Polarimetry; Veiling
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Manuscript submitted: 2001-Oct-30
"The Future of Cool-Star Astrophysics", 2003, Eds. A. Brown,
G. M. Harper, & T. R. Ayres.
Proceedings of 12th Cambridge Workshop on Cool Stars, Stellar Systems,
& The Sun,
© 2003 University of Colorado.