Paper:	Studying Gas in Young and Debris Disks Using Spitzer
Volume:	357, The Spitzer Space Telescope: New Views of the Cosmos
Page:	47
Authors:	Hollenbach, D.; Gorti, U.
Abstract:	We present results from models that self-consistently calculate the gas chemistry, gas temperature, dust temperature, and vertical density distribution in circumstellar disks around young stars, and that predict the emergent infrared spectra. A parameter study of optically thin disks shows that fine structure lines such as [SI] 25 μm are generally stronger than the H2 rotational lines. Spitzer can detect lines from disks ≤ 100 pc with gas masses of ≥ 0.01MJ and some dust present (≥ 10−7 MJ ) to heat the gas. We model Spitzer upper limits on line fluxes from HD105, a 30 Myr old G0V star, and provide upper limits on the gas surface density and mass (≤ 1MJ ) in the planet-forming region (1-40 AU). Preliminary results for younger, optically thick disks are briefly discussed.

Astronomical Society of the Pacific
Conference Series

© Copyright 1988 - 2024 - Astronomical Society of the Pacific
No part of the material protected by this copyright may be reproduced or used in any form other than for personal use without written permission from the ASP.

Page generated in 0.065 seconds