Enoch, Melissa L. and Corder, Stuartt and Duchêne, Gaspard and Bock, Douglas C. and Bolatto, Alberto D. and Culverhouse, Thomas L. and Kwon, Woojin and Lamb, James W. and Leitch, Erik M. and Marrone, Daniel P. and Muchovej, Stephen J. and Pérez, Laura M. and Scott, Stephen L. and Teuben, Peter J. and Wright, Melvyn C. H. and Zauderer, B. Ashley (2011) Disk and Envelope Structure in Class 0 Protostars. II. High Resolution Millimeter Mapping of the Serpens Sample. Astrophysical Journal Supplement Series, 195 (2). Art. No. 21. ISSN 0067-0049 http://resolver.caltech.edu/CaltechAUTHORS:20110927-112958464
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We present high-resolution CARMA 230 GHz continuum imaging of nine deeply embedded protostars in the Serpens Molecular Cloud, including six of the nine known Class 0 protostars in Serpens. This work is part of a program to characterize disk and envelope properties for a complete sample of Class 0 protostars in nearby low-mass star-forming regions. Here, we present CARMA maps and visibility amplitudes as a function of uv-distance for the Serpens sample. Observations are made in the B, C, D, and E antenna configurations, with B configuration observations utilizing the CARMA Paired Antenna Calibration System. Combining data from multiple configurations provides excellent uv-coverage (4-500 kλ), allowing us to trace spatial scales from 10^2 to 10^4 AU. We find evidence for compact disk components in all of the observed Class 0 protostars, suggesting that disks form at very early times (t < 0.2 Myr) in Serpens. We make a first estimate of disk masses using the flux at 50 kλ, where the contribution from the envelope should be negligible, assuming an unresolved disk. The resulting disk masses range from 0.04 M_☉ to 1.7 M_☉, with a mean of approximately 0.2 M_☉. Our high-resolution maps are also sensitive to binary or multiple sources with separations ≳ 250 AU, but significant evidence of multiplicity on scales <2000 AU is seen in only one source.
|Additional Information:||© 2011 The American Astronomical Society. Received 2010 November 19; accepted 2011 June 1; published 2011 August 4. The authors thank the referee for comments and suggestions that improved this manuscript. Support for this work was provided by NASA through the Spitzer Space Telescope Fellowship Program, through a contract issued by the Jet Propulsion Laboratory (JPL), California Institute of Technology, under a contract with NASA. D.P.M. was supported by NASA through Hubble Fellowship grant HST-HF-51259.01 Support for CARMA construction was derived from the states of California, Illinois, and Maryland, the Gordon and Betty Moore Foundation, the Kenneth T. and Eileen L. Norris Foundation, the Associates of the California Institute of Technology, and the National Science Foundation. Ongoing CARMA development and operations are supported by the National Science Foundation under a cooperative agreement, and by the CARMA partner universities.|
|Subject Keywords:||ISM: individual objects (Serpens); stars: formation; submillimeter: ISM; techniques: interferometric|
|Classification Code:||PACS: 97.21.+a; 98.62.Ai; 97.30.Sw; 98.58.Db|
|Official Citation:||Disk and Envelope Structure in Class 0 Protostars. II. High-resolution Millimeter Mapping of the Serpens Sample Melissa L. Enoch et al. 2011 ApJS 195 21|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Ruth Sustaita|
|Deposited On:||27 Sep 2011 20:03|
|Last Modified:||26 Dec 2012 13:42|
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