Michael MEYER : Steward Observatory, University of Arizona
Evolution of debris discs: observational constraints
Over the past 15 years, debris discs have been recognized as playing an important role in helping us understand the formation and evolution of planetary systems. We begin with a definition of debris disc (in contrast to primordial disc) and discuss observations concerning their evolution as a function of wavelength from a number of studies utilizing ground- and space-based telescopes including the Spitzer Space Telescope. Our goal is to trace the evolution of parent bodies as a function of radius in the systems observed. We summarize trends in debris discs identified to date as a function of stellar properties such as mass, companions, metalicity, and formation environment and comment on the implications for planet formation. We attempt to address whether observations to date suggest that planetary systems like our own are common or rare.Last modified: Sun Jul 9 17:58:05 2006