Speaker
Martin Roth
Description
Over the last 10-15 years there has been a rapid development of the technique of integral field spectroscopy (IFS) in the optical and NIR at 4-8m telescopes, with high impact on the study of the evolution of galaxies, e.g. surveys like SAURON, ALTAS3D, CALIFA. Beyond the mere 2-dimensional mapping of extended objects, we have begun to explore the potential of IFS for PSF-fitting 3D spectrophotometry in crowded fields, an area harboring one of the most competitive edges of future extremely large telescopes. As shown with a previous pilot study at Calar Alto Observatory, observations of globular clusters with high multiplex gain using 3D spectroscopy has allowed us to determine velocity dispersions in the innermost region, i.e. within radii of 1.5 arcsec, which is the crucial region to constrain Jeans models and, thereby, the mass of a hypothetical intermediate mass black hole (IMBH). With the commissioning of the MUSE instrument at the ESO Very Large Telescope Observatory in 2014, these opportunities have grown to unprecedented capabilities. The latest developments for extremely high multiplex spectroscopy in globular clusters to constrain IMBH masses will be reported.
