Modeling Gas Emission Lines from Circumstellar Disks

Details Modeling Gas Emission Lines from Circumstellar Disks Modeling Gas Emission Lines from Circumstellar Disks

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sptz.prop50718g&link_type=abstract

Spitzer Proposal ID #50718

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Scientific paper

We propose an archival Spitzer data analysis and theoretical modeling of a sample of 4 circumstellar disks (Sz 102, XX Cha, T Cha, HD 132947), with conclusive evidence for the presence of gas in the 1-20 AU region as probed by the Spitzer IRS. We will compare our sophisticated thermo- chemical disk models to observed line emission and upper limits from Spitzer IRS archival data. Our disks have detections of H_2, [NeII] and [FeI] lines and we will use our models to interpret this data and upper limits on other expected strong transitions such as H_2O, [FeII], [SiII], [SI] and OH lines. Inferred disk and stellar properties will include disk geometry (flaring or flat), dust/gas ratio, the strength and hardness of the Extreme UltraViolet stellar radiation field, disk gas mass, chemistry and distribution in the planet-forming regions of these disks.

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