Physics
Scientific paper
Oct 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005nrdd.conf...17k&link_type=abstract
Proceedings of the Miniworkshop on Nearby Resolved Debris Disks. October 19-20, 2005. Space Telescope Science Institute, Baltimo
Physics
Scientific paper
Since its initial discovery, the disk around Beta Pictoris has served as a prototype for "debris disks," even though it differs in many ways from the IRAS-excess sources it was thought to represent. A vast literature of post-discovery observations has yielded a continuously evolving picture of its properties and their relevance to the origin of planetary systems. Recent high-resolution images together with broader Spitzer surveys of disks in earlier and later stages of evolution provide a broader context for our understanding, even as they raise new questions and point the way for further study. The star is now believed to be younger and the disk more radially non-uniform than originally supposed. A small sample of more-distant objects are emerging as similar in these respects. Differences abound, however, across a larger sample of stars with diverse ages and spectral types. In the end, Beta Pic may be correctly viewed as a prototype of only one evolutionary path among many for circumstellar dust grains around young stars.
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