Astronomy and Astrophysics – Astronomy
Scientific paper
May 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aas...202.2404g&link_type=abstract
American Astronomical Society Meeting 202, #24.04; Bulletin of the American Astronomical Society, Vol. 35, p.729
Astronomy and Astrophysics
Astronomy
Scientific paper
We present the results of detailed thermo-chemical modelling of small amounts of gas (0.01 to 10 M J) in optically thin dust disks, with dust masses in small (a<1 mm) particles ranging from 3 x 10-5 to 0.3 M E. We self-consistently solve for the temperature and vertical density structure of the inner planet-forming regions of a gas disk heated by processes such as collisions with warm dust grains, FUV pumping of molecular hydrogen and stellar X-rays. The gas radiates strongly in various infrared lines (e.g. SI(25μ m), H2(12μ m, 17μ m, 28μ m), several OH and H2O lines) which could provide an important diagnostic for the presence of gas in disks and the physical and chemical conditions in the disk. We discuss the possibility of detection by SIRTF of small amounts of gas (≳ 0.1 M J) in disks by analyzing expected line fluxes and line to continuum ratios.
Gorti Uma
Hollenbach David
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