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Molecular Cores in Taurus: Evolution and Dynamics

Published online by Cambridge University Press:  21 March 2013

Lei Qian ,
Di Li  and
Paul Goldsmith
Lei Qian
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, P. R. China email: lqian@nao.cas.cn
Di Li
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, P. R. China email: lqian@nao.cas.cn
Paul Goldsmith
Affiliation:
Jet Propulsion Laboratory, California Institute of Technology, CA, USA
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Abstract

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The evolution and dynamics of the molecular cores traced by 13CO J = 1 → 0 emission in the Taurus molecular cloud are studied. We performed a systematic examination of the distribution and dynamic state of cores in a large contiguous region, as well as the core ages, which lie between 106 and 107 years. The core velocity dispersion (CVD), which is the variance of the core velocity difference δ v, exhibits a power-law behavior as a function of the apparent separation L, i.e. CVD (km/s) ∝ L (pc)0.7, with similarities to Larson's law for the velocity dispersion of the gas.

Keywords

ISM: clouds — ISM: molecules — ISM: individual (Taurus) — turbulence
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S292: Molecular Gas, Dust, and Star Formation in Galaxies , August 2012 , pp. 252
Copyright
Copyright © International Astronomical Union 2013

References

Goldsmith, P. F., Heyer, M., Narayanan, G., Snell, R., Li, D., & Brunt, C. 2008, ApJ, 680, 428Google Scholar