Physics
Scientific paper
Jul 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993hst..prop.4620s&link_type=abstract
HST Proposal ID #4620
Physics
Hst Proposal Id #4620
Scientific paper
We propose to employ the unique imaging capabilities of HST to obtain high resolution PC images of the dust disk about Beta Pictoris. Our goal is to obtain accurate photometry of the disk, and to investigate the reported variable disk thickness, and delineate more clearly the size distribution and optical properties of the circumstellar dust. Beta Pic currently represents our best candidate for a proto-planetary system and the only known star with a circumstellar disk that is detectable with imaging techniques. The use of the WF/PC Baum spot is not practical for imaging the disk due to the large differences in brightness between the central star (V ~3.9) and the disk (V ~16 mag/sq. arcsec). As a solution, we will position the core of the stellar PSF for Beta Pictoris in one frame of a PC image, isolating the blooming and saturation due to the overexposure of beta Pictoris to this frame Thus, details of the dust disk normally masked by the extended halo of the PSF core will be revealed in adjacent CCD frames. The WF/PC aboard the Hubble Space Telescope is the only imaging device that has this capability.
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