Galaxy structure and kinematics towards the NGP
Abstract
We present a proper motion survey over about 200 square degrees towards the NGP, based on the material used for the construction of the GSC-II, that we are using to study the vertical structure and kinematics of the Galaxy. In particular, we measured the rotation velocity of the halo up to 10 kpc above the galactic plane traced by a sample of RR Lyr{\ae} and BHB giants for which radial velocities were used to recover the complete distribution of the spatial velocities. Finally, the impact of astrometric and spectroscopic GAIA observation are discussed.
Cite
@article{arxiv.astro-ph/0212351,
title = {Galaxy structure and kinematics towards the NGP},
author = {A. Spagna and C. Cacciari and R. Drimmel and T. Kinman and M. G. Lattanzi and R. L. Smart},
journal= {arXiv preprint arXiv:astro-ph/0212351},
year = {2007}
}
Comments
10 pages, 6 figures. Proceedings of the Monte Rosa Conference "GAIA spectroscopy, science and technology" Gressoney Saint Jean (Valle d'Aosta, Italy), Sept 9-12, 2002, ed. U. Munari, ASP Conf. Ser., in press