to IAU
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. Kinman

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.

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