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The Environment of High-Mass Young Stellar Objects

Published online by Cambridge University Press:  07 August 2017

Jean-Pierre Maillard  and
George F. Mitchell
Jean-Pierre Maillard
Affiliation:
Institut d'Astrophysique de Paris 98b Boulevard Arago Paris 75014 France
George F. Mitchell
Affiliation:
Department of Astronomy Saint Mary's University Halifax, N.S., B3H 3C3 Canada

Abstract

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Using high-resolution infrared CO spectroscopy new results have been obtained on the environment of high-mass young stellar objects (YSOs). In particular, a new class of neutral, warm and dense outflows has been discovered. The infrared outflows appear a general phenomenon of the activity of high-mass YSOs. With well-defined and often multiple velocities they seem to correspond to episodic and violent mass-loss events from the central source. In addition, a shell of warm, quiescent gas, is formed near the massive star. All these dynamical elements influence the chemistry inside the giant molecular clouds. Beside CO in solid and in gas phase, detection in the infrared has been attempted of simple molecules like CH4, C2H2, H2O and ion H3+ toward few of these sources.

Type
Quiescent Clouds and Regions of Star Formation
Information
Symposium - International Astronomical Union , Volume 150: Astrochemistry of Cosmic Phenomena , 1992 , pp. 259 - 264
Copyright
Copyright © Kluwer 1992 

References

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