JPL Home NASA Home Caltech Home
Follow this link to skip to the main content
NASA Logo - Jet Propulsion Laboratory   + View the NASA Portal
Search JPL
JPL Home Earth Solar System Stars & Galaxies Technology
Science Visitor and Colloquium Program
SVCP Home
Meetings
Information for Visitors
Contact
Restricted
 
Exoplanet Science Seminar

The Origin and Evolution of Dust and Gas in Debris Disks
Presented by Christine Chen (Host: Wes Traub)
Space Telescope Science Institute

Wednesday, October 23, 2013
4:00 P.M. in 169-336

Abstract
Debris disks are dusty, gas-poor disks around young stars, generated by collisions between parent bodies and/or sublimation of comets. The Spitzer Space Telescope has enabled photometric searches and detailed spectroscopic studies of thermal emission from dust in hundreds of debris disks at mid- to far-infrared wavelengths. These observations allow us: (1) to infer the spatial structure of dust in individual systems and determine how the dust grains are removed; (2) to measure the disk fraction (in young associations and moving groups) as a function of age, to constrain the mechanism that triggers collisions; and (3) to place constraints on the mass of circumstellar molecular hydrogen and therefore models for giant planet formation. In this talk, I will discuss the spatial structure and removal mechanisms of dust in debris disks, and constraints on the models for the formation of gas giants and the late-stages of solar system evolution. I will also describe outstanding questions about debris disk evolution that will be addressed using future ground- and space-based instruments.


Center for Exoplanet Science


Privacy / Copyrights
  NASA Home Page
Site Manager:
Webmaster:

CL 08-3220