Computer Science
Scientific paper
May 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007sptz.prop40247c&link_type=abstract
Spitzer Proposal ID #40247
Computer Science
Scientific paper
By studying the inner, planet-forming regions of circumstellar disks around low-mass pre-main sequence stars we can refine theories of giant planet formation and develop timescales for the evolution of disks and their planets. Spitzer low-resolution IRS observations of T Tauri stars (TTS) in the Chamaeleon, IC 348, and NGC 2068/2071 star-forming regions have given us an unprecedented look at dust evolution in young objects spanning 1-3 Myr. However, despite this ground breaking progress in studying the dust in young disks, the gas properties of the inner disk remain essentially unknown. With high resolution IRS, we propose to search for 12.81 micron Neon fine structure emission originating in the innermost disk regions of classical TTS in different stages of evolution with the objective of revealing the timescales of gas dissipation and its relationship to dust evolution. These observations will complement ground-based gas studies with Magellan/MIKE and Gemini/Phoenix. With the combined results of Spitzer, Gemini, and Magellan, our theoretical analysis will unveil the state of the dust and gas in disks in which planets may already be forming and starting to open gaps.
Bergin Edwin
Calvet Nuria
Espaillat Catherine
Furlan Elise
Hartmann Lee
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