Identification of field dwarfs and giants in RAVE
  The second RAdial Velocity Experiment (RAVE) Data Release (DR2) derives log g
values but we present a simpler and cleaner method of identifying dwarfs and
giants using only magnitudes, which does not require spectroscopic analysis. We
confirm the Bilir et al. (2006) procedure which estimates the number of dwarfs
and giants via their positions in the J-V two magnitude diagram by applying it
to RAVE DR2. It is effective in estimating the number of dwarfs and giants at
J-H>0.4 compared to RAVE's log g values. For J-H<=0.4, where dwarfs and
subgiants show a continuous transition in the J magnitude histogram, we used
the Besancon Galaxy model predictions to statistically isolate giants. The
percentages of giants for red stars and for the whole sample are 85% and 34%,
respectively. If we add the subgiants, the percentage of evolved stars for the
whole sample raises to 59%. For the first time in the literature, we analysed
the effect of CHISQ on RAVE's log g values (CHISQ is the penalised chi^2 from
RAVE's technique of finding an optimal match between the observed spectrum and
synthetic spectra to derive stellar parameters). Neither the CHISQ values nor
the signal-to-noise ratio bias RAVE log g values. Therefore the method of
identifying dwarfs and giants via the two magnitude diagram has been verified
against an unbiased dataset.
