ÿ
we can measure physical parameters as
star
mass, radius
, probing our understanding
of the
EOS
.
ÿ
we can measure the
surface
temperature
and reconstruct the
cooling history
of the
source.
ÿ
we can detect/undetect
spectral features,
constraining
chemical composition and/or
magnetic field strength
in the atmosphere.
THIS MEANS THAT,
AS SINGLE OBJECTS
THEY ARE INTERESTING BECAUSE: