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Gas evolution in protoplanetary disks

Thi, W. F. and van Dishoeck, E. F. and van Zadelhoff, G. J. and Blake, G. A. and Mannings, V. and Sargent, A. I. and Horn, J. and Becklin, E. E. and van den Ancker, M. E. and Natta, A. (2004) Gas evolution in protoplanetary disks. In: Planetary Systems in the Universe – Observation, Formation and Evolution. IAU Symposium Proceedings Series. No.202. Astronomical Society of the Pacific , San Francisco, CA, pp. 378-380. ISBN 9781583811764.

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We present the results of a study of the evolution of the gas and dust in disks around T Tauri, Herbig Ae and Vega-like stars. We observed the two lowest rotational lines of H2 with the ISO-SWS as well as ^(12)CO 3–2 and ^(13)CO 3–2 with the JCMT, and CO 6–5 with the CSO. The H_2 lines trace the warm (∽ 100 K) inner region whereas the CO lines probe the colder outer disks. Substantial amounts of H_2 have been detected toward T Tauri and Herbig Ae stars, and, surprisingly, also around three Vega-like objects (49 Cet, HD 135344 and β Pictoris). In contrast with previous conclusions derived from CO data, a significant mass of warm gas is found to persist up to ages of several tens of Myrs, suggesting that slow formation of gas-rich giant planets is possible.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
van Dishoeck, E. F.0000-0001-7591-1907
Blake, G. A.0000-0003-0787-1610
Sargent, A. I.0000-0002-4633-5098
Additional Information:© 2004 Astronomical Society of the Pacific.
Series Name:IAU Symposium Proceedings Series
Issue or Number:202
Record Number:CaltechAUTHORS:20181207-125031394
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Official Citation:Thi, W., Van Dishoeck, E., Van Zadelhoff, G., Blake, G., Mannings, V., Sargent, A., . . . Natta, A. (2004). Gas evolution in protoplanetary disks. Symposium - International Astronomical Union, 202, 378-380. doi:10.1017/S0074180900218317
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:91576
Deposited By: Tony Diaz
Deposited On:07 Dec 2018 21:15
Last Modified:16 Nov 2021 03:42

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