Volume 510, February 2010
|Number of page(s)||7|
|Section||Galactic structure, stellar clusters, and populations|
|Published online||04 February 2010|
Modeling proper motions beyond the Galactic bulge
Geneva Observatory, University of Geneva, 1290 Sauverny, Switzerland e-mail: firstname.lastname@example.org
Accepted: 15 December 2009
We analyse the radial and tangential velocity fields in the Galaxy as seen from the Sun by using as a first approximation a simple axisymmetric model, which we then compare with the corresponding fields in a barred N-body model of the Milky Way. This provides a global description of these quantities missing in the literature, showing where they take large values susceptible to be used in future observations even for sources well beyond the Galactic center. Absolute largest proper motions occur at a distance slightly behind the Galactic center, which are there 1.5 times larger than the highest local proper motions due to the Galactic differential rotation. Large proper motions well beyond the Galactic center are well within the current astrometric accuracy.
Key words: Galaxy: kinematics and dynamics / Galaxy: general
© ESO, 2010
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.