Probing planetary formation around main- sequence stars: A snapshot survey

Details Probing planetary formation around main- sequence stars: A snapshot survey Probing planetary formation around main- sequence stars: A snapshot survey

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997hst..prop.7897c&link_type=abstract

HST Proposal ID #7897

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Hst Proposal Id #7897 Interstellar And Intergalactic Media

Scientific paper

IR excess Main-Sequence {MS} stars host cool circumstellar dust disks, which are most likely replenished by the debris of unseen planetesimals. Although IRAS discovered more than 100 MS stars with IR excesses only one star, Beta Pictoris, appears to have an optically detectable, disk-like nebulosity. We propose to undertake a NICMOS snapshot survey of MS IR excess stars designed to discover new circumstellar disks in the H band, address the statistics of disk detection, and correlate MS disk properties with spectral type, age and fractional far-IR luminosity. With its diffraction-limited coronograph NICMOS will allow us to significantly improve upon previous ground-based surveys, by exploiting the advantages of suppression of diffracted light in the PSF, coupled with the increased surface brightness of the disks in the near-IR, with respect to the visible. Successful detections of circumstellar disks and modelling of the scattered and re-emitted thermal radiation will allow us to determine detailed disk properties. Any positive detection will represent a giant step forward in understanding how planetary systems form and evolve. In combination with models of scattered light from disks, non detections will enable us to constrain the properties of the constituent grains."

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