CfA Colloquium: September 19, 2002

Speaker: Alycia Weinberger (Carnegie DTM)

Title: The Planet - Circumstellar Disk Connection

Abstract: Using the high spatial resolution and sensitivity of the Hubble Space Telescope and Keck Telescope, I am studying dusty circumstellar disks as the birthplaces of planetary systems. The observations elucidate disk geometries and dust composition and in an ensemble fashion teach us about the evolution of disks and the timescales for planet formation within them. In this talk, I will show visual and near-infrared imaging and mid-infrared spectroscopy of disks around stars which are all about 10 Myr old, yet which vary dramatically in physical size, morphology and composition. Even at this young age, embryonic planets may be modifying their envrionments.

Reference for students:
"Infrared Views of the TW Hydrae Disk"
Weinberger, A. J. et al. 2002, ApJ, 566, 409