Determining Inner-Disk Chemistry

Details Determining Inner-Disk Chemistry Determining Inner-Disk Chemistry

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sptz.prop50152k&link_type=abstract

Spitzer Proposal ID #50152

Computer Science

Scientific paper

Observational data regarding gas phase properties, such as temperature and chemical abundances, in the inner few AU around young stars are are woefully sparse. Past Spitzer IRS observations of IRS 46 suggest that molecular absorption provides a method for examining this region and possibly sampling the disk itself (Lahuis et al. 2006). We propose to observe targets with large line-of-sight extinction, edge-on disks and the class of objects known as infrared companions to search for gas phase absorption in molecules such as C2H2, HCN, and CO2. In addition, we will use the SL1 and SL2 modules to extend the search to include the two molecules predicted to be most abundant in the inner disk, H2O and CH4. The combined data sets will provide abundances of many of the molecules considered important to inner disk chemistry and help us to examine the chemical evolution of protoplanetary disk gas relative to the interstellar medium and our own solar system.

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