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A survey of circumstellar structure around young low mass stars

Terebey, S. and Beichman, C. A. and Gautier, T. N. and Hester, J. J. and Myers, P. C. and Vogel, S. N. (1991) A survey of circumstellar structure around young low mass stars. In: Fragmentation of Molecular Clouds and Star Formation. International Astronomical Union Symposium (IAUS). No.147. Springer Netherlands , Dordrecht, pp. 345-352. ISBN 9780792311591.

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We present results from a near-infrared array, CO interferometer, and H₂O maser interferometer survey of the circumstellar environments of 26 young low-luminosity embedded stars located in nearby molecular clouds. About 75% of the sample show evidence for stellar winds/outflows in the near-infrared or CO data indicating that most of these sources are in the early wind clearing phase of their evolution. Close to 15% are multiple on the scale of 20”, suggesting that fragmentation of their surrounding dense cloud cores is important before or during gravitational collapse. Roughly 10% have H₂O maser emission and the kinematics imply the masers arise in gravitation ally unbound gas (i.e., a stellar wind or outflow) rather than in a circumstellar disk.

Item Type:Book Section
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URLURL TypeDescription ReadCube access
Beichman, C. A.0000-0002-5627-5471
Additional Information:© Springer Science+Business Media Dordrecht 1991. This paper is dedicated to the memory of Gary Bailey who died on January 26. 1990. Gary pioneered the use of infrared arrays for astronomical use and was a good friend who will be sorely missed. Thanks to the Palomar crew for their usual good cheer as the new camera was installed and debugged. CAB thanks J. Bahcall for the hospitality of the Institute of Advanced Study during his sabbatical leave. Palomar Observatory is supported by a grant from the National Science Foundation. This work was carried out in part at the Jet Propulsion Laboratory, California Institute of Technology, under a contract with the National Aeronautics and Space Administration. This work was also supported by NASA grant 188-44-24-10. NSF grant AST 84-12473, and by a grant from the Caltech President's fund. The junctions used in the SIS receivers at OVRO were provided by R. E. Miller of AT&T Bell Labs.
Funding AgencyGrant Number
NSFAST 84-12473
Caltech President’s FundUNSPECIFIED
Subject Keywords:infrared sources, stars-accretion, circumstellar gas, star formation, pre-main-sequence stars, stellar winds, binaries
Series Name:International Astronomical Union Symposium (IAUS)
Issue or Number:147
Record Number:CaltechAUTHORS:20201124-174614869
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:106820
Deposited By: Rebecca Minjarez
Deposited On:03 Dec 2020 23:45
Last Modified:16 Nov 2021 18:57

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