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Accueil > Séminaires > A stellar census in Galactic globular

A stellar census in Galactic globular clusters with MUSE

Sebastian Kamann

In my talk I will present results from a large survey of around 25 Galactic globular clusters with the integral field spectrograph MUSE. Thanks to the unprecedented multiplexing capabilities of this new instrument we can obtain samples of 10000 stars per cluster, making this the largest spectroscopic survey of this kind to date. The spectra cover a wide variety of stellar types, ranging from main sequence and giant stars to blue stragglers and emission-line stars. My presentation will focus on how we use these spectra to investigate
the kinematics of the sample clusters. The data allow us to precisely measure the central dispersion or rotation fields and therefore to constrain the presence of intermediate mass-black holes. By virtue of a dedicated multi-epoch observing strategy, we can also determine binary fractions and periods inside the clusters.