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This proposal is for a survey of a sample of 25 nearby F, G, and K
main sequence stars for "hot" (terrestrial planet temperature) dust
emission analogous to that from our zodiacal (zody) dust.  This
program is an extension of the ongoing ISO RSTENCEL.VEGADIS5,6,7,8
programs that consist of a survey of A-M main sequence stars for
"cold" dust emission as in the Vega / beta Pic systems.  Zody dust
is planetary material, mostly produced by asteroid collisions.
Detection of zody dust around a solar-type star would be a good
indicator of planets orbiting in roughly the same temperature regime.
Several nearby stellar systems have been found in the last year
to have perturbing bodies with masses of order that of Jupiter.
"Jupiters" apparently may be found orbiting solar-type stars at radii
anywhere from 0.05 to 5+ AU.  In collaboration with Geoff Marcy we
propose here to examine a subset of his radial velocity planet-search
stars for for evidence of zody dust.  Our subset contains 6 stars
with and 19 stars without detected planetary pertubations.
This investigation will use the ISOPHT 16 and 20 micron filters.
These are chosen to span the wavelength range around the blackbody
peak of terrestrial planet material where the combination of contrast
to a stellar photosphere and sensitivity of ISO photometry is most
favorable.  Photometry at 16 microns is impossible from the ground
and can be done at 20 microns with the necessary precision only with
great difficulty at the largest telescopes.