Are there Large Dust Grains in Orion's Proto-Planetary Disks?

Details Are there Large Dust Grains in Orion's Proto-Planetary Disks? Are there Large Dust Grains in Orion's Proto-Planetary Disks?

Jul 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001hst..prop.9125b&link_type=abstract

HST Proposal ID #9125

Physics

Hst Proposal Id #9125 Star Formation

Scientific paper

We propose to acquire dithered PC images of six of the largest circumstellar disks in the Orion nebula to study the unique properties of dust within these systems. Previous observations of these disks indicate the dust has begun to coagulate to sizes much larger than ISM particles in the first steps toward planetary formation -- even as the disks are rapidly photoevaporated by luminous O and B stars in the nearby Trapezium cluster. By extending the wavelength range and improving the the spatial resolution of existing observations, we will be able to make definitive tests for the existence of large grains within Orion's proplyds, and explore the dynamics of these grains as the disks are being photoevaporated away. Our observations will provide insight into key scientific questions of fundamental importance: Under what conditions can planets form? Must planets form rapidly? How can we detect the earliest stages of planetary formation?

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