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Massive Star Formation: Observational Constraints

Published online by Cambridge University Press:  25 May 2016

Ed Churchwell
Ed Churchwell*
Affiliation:
Dept. of Astronomy, University of Wisconsin, 475 N. Charter St.,Madison, WI, 53706, USA

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Observations during the past several years strongly imply that virtually every star, independent of final mass, goes through a phase of rapid outflow simultaneously with rapid accretion during formation. The structure and properties of outflows and accretion disks associated with low-mass star formation has received intensive observational attention during the past several years (see the reviews and references in Lada 1985; Edwards, Ray, and Mundt 1993; Fukui et al. 1993; and this symposium). Young stellar objects (YSOs) with Lbol < 103 L⊘ will be referred to as “low-mass” stars in this review. The range of physical properties of CO outflows associated with YSOs of all masses are enormous, see Fukui et al. (1993). I will focus attention in this review on what we know about massive YSOs and their environments.

Type
V. Low- and High-Mass Protostars and Their Environment
Information
Symposium - International Astronomical Union , Volume 182: Herbig-Haro Flows and the Birth of Low Mass Stars , 1997 , pp. 525 - 536
Copyright
Copyright © Kluwer 1997 

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