to IAU
Symposium 241
Symposium 241
Abstract details
Monitoring the structure of the Galactic halo up to 10-12 kpc with BHB and
RR Lyrae stars
C. Cacciari, A. Bragaglia, A. Buzzoni, E. Carretta, T.D. KinmanAbstract
RR Lyrae variables and blue horizontal branch (BHB) stars are good tracers
of the old stellar population in the Galactic halo. Samples of these stars
reaching as far as 10-12 kpc have been observed in a few directions, e.g.
towards the North Galactic Pole, the South Galactic Pole and the Anticentre.
The photometric data, radial velocities and proper motions allow us to
derive the space motion vectors UVW and hence monitor the structure of the
halo stellar population.