Disks around Main Sequence Stars

Details Disks around Main Sequence Stars Disks around Main Sequence Stars

Jul 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994hst..prop.5205t&link_type=abstract

HST Proposal ID #5205

Physics

Hst Proposal Id #5205 Interstellar Medium Circumstellar Matter

Scientific paper

Alpha Lyrae, Epsilon Eroidani, and Alpha PSA, are known to be surrounded by material because they exhibited large infrared excesses when observed by IRAS. We seek to image this material in reflected light from the central star. If the presumed disks are detected, similar analysis to that done for the Beta Pictoris disk will be possible. Even if not, stringent constraints on the albedo should be obtained, and the upper bound will be an order of magnitude below the best ground based results. The novel observational technique involves a combination of roll deconvolution, polarizers and PSF modelling in order to allow the central stellar image and associated scattered light to be subtracted. The ability of the WFPC2 CCDs to prevent blooming across columns is crucial to confine the overflowing stellar photoelectrons and prevent obscuring the region to be observed.

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