EAS Publications Series
Volume 67-68, 2014The Milky Way Unravelled by Gaia: GREAT Science from the Gaia Data Releases
|Page(s)||241 - 245|
|Section||The Origin and History of the Milky Way|
|Published online||17 July 2015|
N.A. Walton, F. Figueras, L. Balaguer-Núñez and C. Soubiran (eds)
EAS Publications Series, 67–68 (2014) 241-245
What can Gaia proper motions tell us about Milky Way dwarf galaxies?
Kapteyn Astronomical Institute, PO Box 800, 9700 AV Groningen, The Netherlands
We present a proper-motion study on models of the dwarf spheroidal galaxy Sculptor, based on the predicted proper-motion accuracy of Gaia measurements. Gaia will measure proper motions of several hundreds of stars for a Sculptor-like system. Even with an uncertainty on the proper motion of order 1.5 times the size of an individual proper-motion value of ∼10 mas/century, we find that it is possible to recover Sculptor's systemic proper motion at its distance of 79 kpc.
© EAS, EDP Sciences, 2015