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Results from a VLT/ISAAC survey of ices and gas around young stellar objects

Pontoppidan, K. M.; Fraser, H.; Schöier, F. L.; Dartois, E.; Thi, W. F. and van Dishoeck, E. F. (2003). Results from a VLT/ISAAC survey of ices and gas around young stellar objects. In: SFChem 2002: Chemistry as a Diagnostic of Star Formation, 21-23 August 2002, Waterloo, Canada.

URL: http://arxiv.org/pdf/astro-ph/0211577.pdf
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Abstract

General results from a 3 − 5 μm spectroscopic survey of nearby low-mass young stellar objects are presented. L and M-band spectra have been obtained of ~ 50 low mass embedded young stars using the ISAAC spectrometer mounted on UT1-Antu at Paranal Observatory. For the first time, a consistent census of the CO, H2O ices and the minor ice species CH3OH and OCN and warm CO gas present around young stars is obtained, using large number statistics and resolving powers of up to R = 10 000. The molecular structure of circumstellar CO ices, the depletion of gaseous CO onto grains in proto-planetary disks, the presence of hot gas in the inner parts of circumstellar disks and in outflows and infalls are studied. Furthermore, the importance of scattering effects for the interpretation of the spectra have been addressed.

Item Type: Conference or Workshop Item
Copyright Holders: 2002 Not known
Extra Information: Chemistry as a Diagnostic of Star Formation
Proceedings of the Conference held in Waterloo, Canada, August 21-23, 2002
Edited by Charles L. Curry, Michel Fich
ISBN: 978-0-660-19089-1

Keywords: circumstellar matter; dust; extinction; molecules; infrared
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 37274
Depositing User: Stephen Serjeant
Date Deposited: 28 Jun 2013 09:34
Last Modified: 19 Dec 2017 10:04
URI: http://oro.open.ac.uk/id/eprint/37274
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