Other
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009dps....41.6819h&link_type=abstract
American Astronomical Society, DPS meeting #41, #68.19
Other
Scientific paper
A circumstellar debris disk is tenuous dust disk that is commonly seen in orbit about many young stars. These disks are of great interest, since they might be a consequence of planet formation. Current thinking says that such a disk is spawned by a so-called birth ring of planetesimals that collide and generate the observed dust, which stellar radiation pressure then launches into wide orbits that extend out to hundreds of AU from the central star. Note that a debris disk's equilibrium state reflects a balance between dust production in the birth ring, and collisional destruction of dust. To describe the resulting dust abundance in this disk, a coupled system of nonlinear equations is derived. Fortunately, this system of equations is scale invariant, so the resulting numerical solution to this problem is easily applied to any star-disk system. This presentation will also show how observations of a debris disk's surface brightness can be used to infer the unseen birth ring's dust production rate. It should also be noted that most edge-on debris disks are lopsided, with one side of the disk usually brighter than the other by 50%. This presentation will show how that asymmetry is a natural consequence of the ring having a modest eccentricity.
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