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Distributions of hot molecules in young circumstellar disks

Published online by Cambridge University Press:  06 January 2010

T. Montmerle ,
D. Ehrenreich ,
A.-M. Lagrange ,
H. Nomura ,
Y. Aikawa ,
Y. Nakagawa  and
T. J. Millar
H. Nomura
Affiliation:
ARC, School of Maths. and Physics, Queen's University Belfast, Belfast BT7 1NN, UK
Y. Aikawa
Affiliation:
Dept. of Earth and Planetary Sciences, Kobe University, Nada, Kobe 657-8501, Japan
Y. Nakagawa
Affiliation:
Dept. of Earth and Planetary Sciences, Kobe University, Nada, Kobe 657-8501, Japan
T. J. Millar
Affiliation:
ARC, School of Maths. and Physics, Queen's University Belfast, Belfast BT7 1NN, UK
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Abstract

We have studied the effect of the gas accretion flow on the distribution of molecules in hot inner regions of young circumstellar disks. The gas-phase reactions initiated by evaporation of icy mantle on dust grains are calculated along the accretion flow, and the molecular line emission is simulated using the obtained abundance profiles. Our results have shown that some evaporated molecules keep high abundances and emit strong transition lines only when the accretion velocity is high enough.


Type
Research Article
Information
European Astronomical Society Publications Series , Volume 41: Physics and Astrophysics of Planetary Systems , 2010 , pp. 177 - 180
Copyright
© EAS, EDP Sciences, 2010

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References

Dutrey, A., 2001, in Science with the Atacama Large Millimeter Array, ed. A. Wootten ASP Conf. Ser., 235 (San Francisco: ASP), 215
Nomura, H., Aikawa, Y., Nakagawa, Y., & Millar, T.J., 2008, A&A, submitted
Nomura, H., Aikawa, Y., Tsujimoto, M., Nakagawa, Y., & Millar, T.J., 2007, ApJ, 661, 334 CrossRef
Nomura, H., & Millar, T.J., 2004, A&A, 414, 409
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Woodall, J., Agundez, M., Markwick-Kemper, A.J., & Millar, T.J., 2007, A&A, 466, 1197