Grain Settling and Growth in the Planet Formation Region of Disks

Details Grain Settling and Growth in the Planet Formation Region of Disks Grain Settling and Growth in the Planet Formation Region of Disks

Jun 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005sptz.prop20363c&link_type=abstract

Spitzer Proposal ID #20363

Physics

Scientific paper

We propose to measure the gas-to-dust ratio in a sample of protoplanetary disk atmospheres in order to determine the amount of grain settling and growth at planet formation distances. These processes are a basic and important step in the planet formation process, but direct evidence for them is lacking for the inner disk (< 10 AU). High-resolution IRS spectra of classical T Tauri stars will be obtained to measure the gas content using molecular and atomic diagnostics in the MIR. By modeling the gaseous emission spectra along with IRS low-resolution spectra of dust emission features and continuum, we will be able to determine the gas and dust columns and grain sizes, and constrain the amount of both grain settling and growth in disk atmospheres.

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