With the advent of the Gaia mission, astrometry is experiencing a renaissance. Although Gaia will make important breakthroughs in many different areas, stars in the crowded central fields of globular clusters and at the faint end of the color-magnitude diagram are out of Gaia's reach. However, the stable environment of space makes the Hubble Space Telescope (HST) an excellent astrometric tool. Its diffraction-limited resolution allows it to distinguish and measure positions and brightnesses for faint stars all the way to the center of most globular clusters. I will present recent results from our HST-based, high-precision proper-motion analysis of Galactic globular clusters, with particular focus on kinematic differences among their multiple stellar populations.
Please join us before the Colloquium in Hennings 318 for coffee, tea and snacks at 2:45 pm
Add to Calendar
2018-09-24T15:00:002018-09-24T16:00:00Internal kinematics of globular clustersEvent Information:
With the advent of the Gaia mission, astrometry is experiencing a renaissance. Although Gaia will make important breakthroughs in many different areas, stars in the crowded central fields of globular clusters and at the faint end of the color-magnitude diagram are out of Gaia's reach. However, the stable environment of space makes the Hubble Space Telescope (HST) an excellent astrometric tool. Its diffraction-limited resolution allows it to distinguish and measure positions and brightnesses for faint stars all the way to the center of most globular clusters. I will present recent results from our HST-based, high-precision proper-motion analysis of Galactic globular clusters, with particular focus on kinematic differences among their multiple stellar populations.
Please join us before the Colloquium in Hennings 318 for coffee, tea and snacks at 2:45 pmEvent Location:
Hennings 318