Despite numerous studies, there is no agreement on the radial profile of
the electron core temperature in the steady solar wind (see, e.g.,
[Schwenn & Marsch, 1991], and references therein).
Power law fits to 
yield 
values
in a wide range
from -0.3 to +1.1, depending on the type of flow, solar
activity and heliocentric distance. In order to make a
meaningful comparison
with our southern stream profile, we must consider results involving
fast
solar wind near solar activity minimum. Under these conditions,
[Pilipp et al., 1990]
report values of in the range [0.49-0.74]
(for Helios high-resolution data between 0.3 and 1 AU).
Our determination of 
in steady fast wind associated
to the south coronal hole (where the density varies as 
) is close to
the average of the
above range.
It is noteworthy that an extrapolation of this
profile as close to the Sun as two solar radii radial distance yields an
electron temperature 
K. This value
is close to the maximum temperature of 
K inferred
from charge state
measurements in
the southern polar coronal hole in 1994
[Geiss et al., 1995]; [Ko et al., 1997].