Table 2:
Basic properties and stellar parameters of the sample stars.
a Blaha & Humphreys (1989);
b adopted from the Simbad database at CDS;
c Perryman et al. (1997);
d see text;
e Hanbury Brown et al. (1974);
f Nicolet (1978);
g with RV = 3.9, see Sect. 5.3.
