Origin and Evolution of Ices in Star-Forming Regions: A VLT-ISAAC 3-5 microns Spectroscopic Survey

van Dishoeck, E. F.; Dartois, E.; Pontoppidan, K. M.; Thi, W. F.; D'hendecourt, L.; Boogert, A. C. A.; Fraser, H. J.; Schutte, W. F. and Tielens, A. G. G. (2003). Origin and Evolution of Ices in Star-Forming Regions: A VLT-ISAAC 3-5 microns Spectroscopic Survey. The Messenger, 113 pp. 49–55.

URL: http://www.eso.org/sci/publications/messenger/arch...

Abstract

The VLT has opened up the possibility to perform spectroscopic surveys of large number s of young low-mass stars which are still deeply embedded in their parental clouds. O ur infrared spectra show a rich variety of features due to ices and gas-phase molecule s, each of which trace different aspects of the physical and chemical state of the obj ects. Highlights include fundamental new insight into the structure of interstellar i ces; the first detection of solid methanol in low-mass protostars, a key ingredient fo r building more complex organic molecules; direct evidence for significant freeze-out in edge-on circumstellar discs; and sensitive limits on minor ice components such as a mmonia and deuterated water.

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