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Does the Sagittarius Stream constrain the Milky Way halo to be triaxial?
Rodrigo Ibata, Geraint F. Lewis, Nicolas F. Martin +2
Recent analyses of the stellar stream of the Sagittarius dwarf galaxy have claimed that the kinematics and three-dimensional location of the M-giant stars in this structure constra…
Do globular clusters possess Dark Matter halos? A case study in NGC 2419
Rodrigo Ibata, Carlo Nipoti, Antonio Sollima +3
We use recently published measurements of the kinematics, surface brightness and stellar mass-to-light ratio of the globular cluster NGC 2419 to examine the possibility that this G…
Dwarf Galaxies and Globular Clusters
Michele Bellazzini
I briefly explore some relevant connections and differences between the evolutionary paths of dwarf galaxies and globular clusters.
The horizontal branch morphology of M31 globular clusters. Extreme second parameter effect in outer halo clusters
S. Perina, M. Bellazzini, A. Buzzoni +4
We use deep, high quality colour magnitude diagrams obtained with the Hubble Space Telescope to compute a simplified version of the Mironov index [SMI; B/(B+R)] to parametrize the…
The horizontal branch luminosity vs metallicity in M31 globular clusters
Luciana Federici, Carla Cacciari, Michele Bellazzini +3
Thanks to the outstanding capabilites of the HST, our current knowledge about the M31 globular clusters (GCs) is similar to our knowledge of the Milky Way GCs in the 1960s-1970s, w…
News from the Galactic suburbia: the chemical composition of the remote globular cluster NGC 2419
A. Mucciarelli, M. Bellazzini, R. Ibata +4
We present the chemical analysis of 49 giant stars of the globular cluster NGC 2419, using medium resolution spectra collected with the multi-object spectrograph DEIMOS@Keck. Previ…