Cool Stars 14 - Submitted Abstract # 102
This version created on 05 October 2006

Potential Impact of the EVLA on Studies of Thermal Radio 
Emission from Cool Evolved K-Early M Star Winds


Graham M. Harper, University of Colorado
Jessica E. Bartley, University of Colorado
Alexander Brown, University of Colorado

Cm-radio observations of evolved K and M stars made at the VLA and
ATCA, and subsequent detailed atmospheric modeling, have revealed that
the thermal emission originates from the wind acceleration region
close to the star.  The temperature and density gradients can only be
coarsely described for the handful of stars with existing two or three
wavelength detections.  The EVLA will provide an order of magnitude
increase in sensitivity over the VLA, coming mainly from the increase
in available correlator band-width, and this will offer the
opportunity to map the density and temperature structure of the
stellar winds with unprecedented clarity.  We present new radio fluxes
for cool evolved stars (alpha TrA, gamma Cru, beta Gru, and R Dor) and
use these and existing VLA data to examine the role that the EVLA will
play in future wind studies.  The research is funded by the
undergraduate research component of GALEX Evolution of Stellar Dynamos
(NNG05GE06G) and NSF grant 0206367.

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