The Gas Dissipation Timescale in Protoplanetary Disks

Details The Gas Dissipation Timescale in Protoplanetary Disks The Gas Dissipation Timescale in Protoplanetary Disks

Feb 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003noao.prop..230n&link_type=abstract

NOAO Proposal ID #2003A-0230

Computer Science

Scientific paper

We propose to search for 4.7(micron) CO fundamental emission from T Tauri stars in the age range < 1-20 Myr in order to measure the gas dissipation timescale in protoplanetary disks. CO fundamental emission is a sensitive new probe of gas at planet formation distances (r < 5 AU) and an ideal tracer of a dissipating gas disk, since the fundamental lines are sensitive to even small amounts of gas at the expected temperatures of interest (300-1000 K). With a measurement of the gas dissipation timescale, we will be able to place fundamental constraints on theories of solar system and giant planet formation. In our previous observing run, we observed 8 bright classical T Tauri stars, but we could observe none of the weak- or post-T Tauri stars in our sample due to poor weather conditions. Here we propose for additional time to complete the spectroscopy of the classical T Tauri stars and to obtain the critical complementary spectra of the weak- and post-T Tauri stars.

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