Resolved DEBRIS Discs

Details Resolved DEBRIS Discs Resolved DEBRIS Discs

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ess.....2.4404b&link_type=abstract

American Astronomical Society, ESS meeting #2, #44.04

Astronomy and Astrophysics

Astronomy

Scientific paper

The Herschel DEBRIS survey is a volume-limited survey of 446 of the closest stars at wavelengths of 100 and 160 microns. Excesses at these wavelengths imply the presence of debris discs. Many of these discs were previously imaged with Spitzer but the superior angular resolution of Herschel has allowed us to resolve more than 20 of the largest of these discs. Although similar to the Kuiper belt in our own Solar System, these discs are much more massive and extend much further from their host stars.
I will present images for a selection of these systems and discuss what extra information the resolved data can provide about these systems. For instance, the radii measured from the resolved images are shown to be different from that predicted by a black-body fit to the SEDs. This information allows us to infer properties about the size and composition of the dust. Resolved images can also tell us about the planetary system as a whole as the inner edges of these discs are likely to be the result of sculpting by planets.
This research is funded through a Space Science Enhancement Program grant from the Canadian Space Agency.

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