Processed and unprocessed ices in circumstellar disks

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dc.creatorPontoppidan, K.
dc.creatorDartois, E.
dc.creatorThi, W. -F.
dc.creatorvan Dishoeck, E. F.
dc.date2004-05-31
dc.date.accessioned2026-07-07T02:13:21Z
dc.date.available2026-07-07T02:13:21Z
dc.descriptionWe present 3-5 micron VLT-ISAAC spectroscopy searching for evidence 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. We find no unambiguous evidence for abundant methanol in the observed disks, but give strict upper limits. 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 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.
dc.description3 pages. To be published in the proceedings of the IAU Joint Discussion 14, 2003, Sydney
dc.identifierhttps://arxiv.org/abs/astro-ph/0405628
dc.identifierhttp://arxiv.org/abs/astro-ph/0405628
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/7787
dc.subjectAstrophysics
dc.titleProcessed and unprocessed ices in circumstellar disks
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