Hostname: page-component-7479d7b7d-k7p5g Total loading time: 0 Render date: 2024-07-08T10:48:16.170Z Has data issue: false hasContentIssue false

Processed and Unprocessed Ices in Circumstellar Disks

Published online by Cambridge University Press:  30 March 2016

Klaus Pontoppidan
Affiliation:
Leiden Observatory, P. 0. Box 9513, 2300 RA Leiden, Netherlands
Ewine van Dishoeck
Affiliation:
Leiden Observatory, P. 0. Box 9513, 2300 RA Leiden, Netherlands
Emmanuel Dartois
Affiliation:
IAS, Bât 121, Université Paris XI, 91405 Orsay Cedex, France
Wing-Fai Thi
Affiliation:
Astronomical Institute “Anton Pannekoek”, University of Amsterdam, Kruislaan 403, 1098 SJ Amsterdam, Netherlands

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We present 3-5 µm VLT-ISAAC spectroscopy showing the presence of methanol ices in edge-on disks of young embedded stars. Examples include the disks of L1489 IRS in Taurus and CRBR 2422.8-3423 in Ophiuchus, the last of which has the highest column density of solid CO known toward a YSO. Several additional low-mass sources in the Serpens and Chameleon molecular clouds exhibit abundant solid methanol although it is not clear if the ice is associated with a disk or with the envelope. These are the first detections of solid methanol in the disks and circumstellar environments of embedded young low-mass stars providing evidence that complex molecular species previously observed only in the solid state toward high-mass star forming regions are also present near solar-type young stars. The constraints on the formation mechanisms of methanol and the chemical evolution of ices as the material is incorporated into circumstellar disks are discussed.

Type
I. Joint Discussions
Copyright
Copyright © Astronomical Society of Pacific 2005

References

Aikawa, Y., Ohashi, N. & Herbst, E. 2003, ApJ, 593, 906 CrossRefGoogle Scholar
Boogert, A. C. A., Hogerheijde, M. R. & Blake, G. A. 2002 ApJ, 568, 761 CrossRefGoogle Scholar
Charnley, S.B. & Rodgers, S.D. 2003, This volume, JD 14Google Scholar
van Dishoeck, E. F., Dartois, E., Pontoppidan, K. M. et al. 2003, ESO Messenger, 113, 49 Google Scholar
Pontoppidan, K. M., Dartois, E., van Dishoeck, E. F., Thi, W.-F. & d’Hendecourt, L. 2003, A&A, 404, 17 Google Scholar
Thi, W. F., Pontoppidan, K. M., van Dishoeck, E. F., Dartois, E. & d’Hendecourt, L. 2002, A&A, 394, 27 Google Scholar