Physics
Scientific paper
Jul 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004hst..prop10425m&link_type=abstract
HST Proposal ID #10425
Physics
Hst Proposal Id #10425 Star Formation
Scientific paper
We can indirectly learn about the planet formation process by studying proto-planetary dust disks. In this proposed observational program, we focus on Herbig Ae/Be stars which are pre-main sequence intermediate mass stars {2-10 solar masses} thought to be immediate precursors to the Vega-excess stars like Beta Pictoris. We propose to take ACS coronagraphic images in the F606W filter of 6 Herbig Ae/Be stars, all of which have well constrained spectral energy distributions and are nearby {<200pc}, suggesting possible disk sizes of 3" or larger in radius. We use the recent ACS coronagraph image of Herbig Ae/Be star, HD 141569, which shows a spectacular circumstellar disk, as a template for observing strategy and exposure time estimates. Our observing program involves contemporaneous comparison stars that will be used to subtract the point spread function. These images will constrain the size and possibly, the morphology of the circumstellar dust that may have disk, envelope or disk+envelope geometries. We will analyze these images quantitatively using 2-Dust, an axisymmetric radiative transfer dust code, to derive basic physical parameters of the dusty circumstellar matter such as mass, size, geometry, inclination angle and grain properties.
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