Institute of Astronomy

Herschel-resolved Two-belt Spitzer Debris Disks

SpeakerTalk DateTalk Series
Farisa Morales28 July 2014Across HR 2014 Posters


We use Herschel PACS imaging for a unique set of stars that host on going activity in the terrestrial planet zones and the presence of an outer/colder dust component, to continue the exploration, begun with Spitzer Space Telescope, of their disk structure and composition. The 19 solar? and A?type stars presented here have combined Spitzer IRS+MIPS (5 to 70 ?m) and Herschel PACS (70 or 100 and 160 ?m) SEDs suggesting a two?ring disk architecture, mirroring that of the asteroidal-Kuiper belt geometry of our Solar System. In addition, Herschel provides the sensitivity and angular resolution required to successfully resolve them at 70, 100, and/or 160 ?m. Spatially resolved systems help breach the degeneracy in SED modeling between the grain properties and the dustÂ’s radial location. The goal is to analyze the Herschel-resolved disks within our Spitzer sample in order to compare the architecture of other planetary systems against our own, and to improve understanding of how planetary systems form and evolve.