Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sf2a.conf..641s&link_type=abstract
SF2A-2004: Semaine de l'Astrophysique Francaise, meeting held in Paris, France, June 14-18, 2004. Edited by F. Combes, D. Barret
Astronomy and Astrophysics
Astrophysics
Scientific paper
I present work in progress aimed at measuring the proper motions of dwarf spheroidal galaxies of the Milky Way. We have developed a method based on a Fourier cross-correlation to measure the positions of faint galaxies in the background of these nearby satellite galaxies. This allows us to define an extragalactic reference frame with respect to which we measure the proper motions of the stars in the foreground Galactic satellite. We have begun with a study of the Draco dSph, using HST images. The ultimate aim of this project is to measure the 3-dimensional kinematics of the dwarf spheroidal galaxies, thereby gaining an insight into the interactions between these galaxies and the Milky Way, and on the formation of galaxies.
Ibata Rodrigo A.
Segall Mathieu
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