The puzzling assembly of the Milky Way halo - contributions from dwarf Spheroidals and globular clusters

Details The puzzling assembly of the Milky Way halo - contributions from dwarf Spheroidals and globular clusters The puzzling assembly of the Milky Way halo - contributions from dwarf Spheroidals and globular clusters

2011-09-08

arxiv.org/abs/1109.1838v1

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

6 pages, 4 figures, to appear in the proceedings of "Assembling the Puzzle of the Milky Way", Le Grand Bornand (Apr. 17-22, 20

Scientific paper

While recent sky surveys have uncovered large numbers of ever fainter Milky Way satellites, their classification as star clusters, low-luminosity galaxies, or tidal overdensities remains often unclear. Likewise, their contributions to the build-up of the halo is yet debated. In this contribution we will discuss the current knowledge of the stellar populations and chemo-dynamics in these puzzling satellites, with a particular focus on dwarf spheroidal galaxies and the globular clusters in the outer Galactic halo. Also the question of whether some of the outermost halo objects are dynamically associated with the (Milky Way) halo at all is addressed in terms of proper measurements in the remote Leo I and II dwarf galaxies.

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