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The contribution of disks and envelopes to the millimeter continuum emission from very young low-mass starsWe investigate the question of disk formation during the protostar phase. We model the dust continuum emission from the dense cloud core using the cloud-collapse models of Terebey et al. (1984) and show that dust emission from the dense core is important when measured with large single-dish telescopes at 1.3 mm, but nearly negligible with interferometers at 2.7 mm. From published and new data, we conclude that massive disks are also seen toward a number of other sources including L1448 IRS 3, whose disk mass is estimated to be 0.5 solar mass. However, 1.3 mm data show that massive disks are relatively rare, occurring around perhaps 5 percent of young embedded stars. This implies that either massive disks occur briefly during the embedded phase or that relatively few young stars form massive disks. The median 1.3 mm flux density of IRAS-Dense cores in our sample is nearly the same as T Tauri stars in the sample of Beckwith et al. (1990). We conclude that the typical disk mass is not significantly higher during the embedded phase than during the later T Tauri phase.
Document ID
19930072088
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Terebey, S.
(JPL; California Inst. of Technology Pasadena, United States)
Chandler, C. J.
(Owens Valley Radio Observatory Pasadena, CA, United States)
Andre, P.
(CEA Service d'Astrophysique, Gif-sur-Yvette, France)
Date Acquired
August 16, 2013
Publication Date
September 10, 1993
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 414
Issue: 2
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
93A56085
Funding Number(s)
CONTRACT_GRANT: NSF AST-90-16404
Distribution Limits
Public
Copyright
Other

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