Contents of: VI/111/./abstract/RFOSTER_PROP1_V3.abs

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 The identification of Earth mass planetary companions around a
 nearby millisecond radio pulsar, PSR 1257+12, has raised the
 possibility that planetary systems may form during the evolution
 of these pulsar systems.  We therefore propose to search for the
 thermal dust emission of protoplanetary and debris disks around
 millisecond pulsars and their progenitor binary pulsar systems.

 If dust is present and can be heated by the spin-down energy of
 millisecond pulsars, its infrared flux will dominate that of the
 pulsar or any planets and can be detected by ISO via its
 far-infrared continuum emission. Standard mass limits from pulsar
 timing toward these and other objects generally rule out unknown
 companion objects larger than asteroids.  Further investigation with
 improved instrumentation is warranted on millisecond pulsars as they
 are an important class of systems capable of producing planetary size
 companions, and by inference, systems that may have evolved through
 a stage of protoplanetary formation.  If we detect this dust around
 any millisecond pulsars, the spectral information we obtain with
 ISOPHOT will give us important clues to the formation of planetary
 bodies around post supernova compact stars.  It will also imply that
 planetary formation is quite common around different classes of stars.

 We have selected all known millisecond radio pulsars closer
 than 1 kpc as possible targets for our investigation.  These
 pulsars are distributed around the sky and are reflective of
 current efforts to survey the entire sky for millisecond pulsars.
 ISO observations will substantially improve on early observations
 made in the infrared with IRAS and the IRTF.  ISO will give better
 sensitivity and frequency coverage toward possible remnant planetary
 dust around millisecond pulsars than any ground based observations.