  This paper presents a method to determine effective temperatures, angular
semi-diameters and bolometric corrections for population I and II FGK type
stars based on V and 2MASS IR photometry. Accurate calibration is accomplished
by using a sample of solar analogues, whose average temperature is assumed to
be equal to the solar effective temperature of 5777 K. By taking into account
all possible sources of error we estimate associated uncertainties better than
1% in effective temperature and in the range 1.0-2.5% in angular semi-diameter
for unreddened stars. Comparison of our new temperatures with other
determinations extracted from the literature indicates, in general, remarkably
good agreement. These results suggest that the effective temperaure scale of
FGK stars is currently established with an accuracy better than 0.5%-1%. The
application of the method to a sample of 10999 dwarfs in the Hipparcos
catalogue allows us to define temperature and bolometric correction (K band)
calibrations as a function of (V-K), [m/H] and log g. Bolometric corrections in
the V and K bands as a function of effective temperature, [m/H] and log g are
also given. We provide effective temperatures, angular semi-diameters, radii
and bolometric corrections in the V and K bands for the 10999 FGK stars in our
sample with the corresponding uncertainties.
