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A comparative study of star formation efficiencies in nearby molecular cloud complexes

Published online by Cambridge University Press:  03 August 2017

Yasuo Fukui  and
Akira Mizuno
Yasuo Fukui
Affiliation:
Department of Astrophysics, Nagoya University
Akira Mizuno
Affiliation:
Department of Astrophysics, Nagoya University

Abstract

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We present new observational data of 13CO J=1−0 emission in nearby molecular cloud complexes in Taurus, Ophiuchus, and Orion, and compare star formation efficiencies in the three regions. The 13CO data have been obtained with the 4m millimeter telescope at Nagoya equipped with a SIS receiver having receiver temperature of 23 K in double side band. The molecular distribution is often characterized by highly filamentary, continuous distribution, rather than well defined clumps. Active star formation is taking place almost exclusively in the densest regions in the molecular distributions. The filamentary distributions often show velocity gradients perpendicular to their elongation, suggesting that they are spinning around their major axes. Roles of photoionization and the spinning motion on formation of stars and clouds are discussed as a step toward understanding the mechanism regulating star formation efficiencies.

Type
Star Formation
Information
Symposium - International Astronomical Union , Volume 147: Fragmentation of Molecular Clouds and Star Formation , 1991 , pp. 275 - 288
Copyright
Copyright © Kluwer 1991 

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