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Title: DISK AND ENVELOPE STRUCTURE IN CLASS 0 PROTOSTARS. II. HIGH-RESOLUTION MILLIMETER MAPPING OF THE SERPENS SAMPLE

Abstract

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 k{lambda}), allowing us to trace spatial scales from 10{sup 2} to 10{sup 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 k{lambda}, where the contribution from the envelope should be negligible, assuming an unresolved disk. The resulting disk masses range from 0.04 M{sub sun} to 1.7 M{sub sun}, with a mean of approximately 0.2 M{sub sun}. Our high-resolution maps are alsomore » sensitive to binary or multiple sources with separations {approx}> 250 AU, but significant evidence of multiplicity on scales <2000 AU is seen in only one source.« less

Authors:
; ;  [1];  [2];  [3]; ; ;  [4]; ; ; ; ;  [5];  [6];  [7];  [8]
  1. Department of Astronomy, University of California at Berkeley, 601 Campbell Hall, Berkeley, CA 94720 (United States)
  2. NRAO/ALMA-JAO, Av. Apoquindo 3650, Piso 18, Las Condes, Santiago (Chile)
  3. Combined Array for Research in Millimeter-wave Astronomy, Big Pine, CA 93513 (United States)
  4. Department of Astronomy and Laboratory for Millimeter-wave Astronomy, University of Maryland, College Park, MD 20742 (United States)
  5. Owens Valley Radio Observatory, California Institute of Technology, Big Pine, CA 93513 (United States)
  6. Department of Astronomy, University of Illinois, Urbana, IL 61801 (United States)
  7. Department of Astronomy and Astrophysics, University of Chicago, 5640 S. Ellis Ave. Chicago, IL 60637 (United States)
  8. Department of Astronomy, California Institute of Technology, 1200 East California Blvd, Pasadena, CA 91125 (United States)
Publication Date:
OSTI Identifier:
21560342
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal, Supplement Series
Additional Journal Information:
Journal Volume: 195; Journal Issue: 2; Other Information: DOI: 10.1088/0067-0049/195/2/21; Journal ID: ISSN 0067-0049
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ANTENNAS; CALIBRATION; INTERFEROMETRY; MAPPING; PROTOSTARS; ULTRAVIOLET RADIATION; ELECTRICAL EQUIPMENT; ELECTROMAGNETIC RADIATION; EQUIPMENT; RADIATIONS

Citation Formats

Enoch, Melissa L., Duchene, Gaspard, Wright, Melvyn C. H., Corder, Stuartt, Bock, Douglas C., Bolatto, Alberto D., Teuben, Peter J., Zauderer, B. Ashley, Culverhouse, Thomas L., Lamb, James W., Leitch, Erik M., Muchovej, Stephen J., Scott, Stephen L., Kwon, Woojin, Marrone, Daniel P., and Perez, Laura M.. DISK AND ENVELOPE STRUCTURE IN CLASS 0 PROTOSTARS. II. HIGH-RESOLUTION MILLIMETER MAPPING OF THE SERPENS SAMPLE. United States: N. p., 2011. Web. doi:10.1088/0067-0049/195/2/21.
Enoch, Melissa L., Duchene, Gaspard, Wright, Melvyn C. H., Corder, Stuartt, Bock, Douglas C., Bolatto, Alberto D., Teuben, Peter J., Zauderer, B. Ashley, Culverhouse, Thomas L., Lamb, James W., Leitch, Erik M., Muchovej, Stephen J., Scott, Stephen L., Kwon, Woojin, Marrone, Daniel P., & Perez, Laura M.. DISK AND ENVELOPE STRUCTURE IN CLASS 0 PROTOSTARS. II. HIGH-RESOLUTION MILLIMETER MAPPING OF THE SERPENS SAMPLE. United States. doi:10.1088/0067-0049/195/2/21.
Enoch, Melissa L., Duchene, Gaspard, Wright, Melvyn C. H., Corder, Stuartt, Bock, Douglas C., Bolatto, Alberto D., Teuben, Peter J., Zauderer, B. Ashley, Culverhouse, Thomas L., Lamb, James W., Leitch, Erik M., Muchovej, Stephen J., Scott, Stephen L., Kwon, Woojin, Marrone, Daniel P., and Perez, Laura M.. Mon . "DISK AND ENVELOPE STRUCTURE IN CLASS 0 PROTOSTARS. II. HIGH-RESOLUTION MILLIMETER MAPPING OF THE SERPENS SAMPLE". United States. doi:10.1088/0067-0049/195/2/21.
@article{osti_21560342,
title = {DISK AND ENVELOPE STRUCTURE IN CLASS 0 PROTOSTARS. II. HIGH-RESOLUTION MILLIMETER MAPPING OF THE SERPENS SAMPLE},
author = {Enoch, Melissa L. and Duchene, Gaspard and Wright, Melvyn C. H. and Corder, Stuartt and Bock, Douglas C. and Bolatto, Alberto D. and Teuben, Peter J. and Zauderer, B. Ashley and Culverhouse, Thomas L. and Lamb, James W. and Leitch, Erik M. and Muchovej, Stephen J. and Scott, Stephen L. and Kwon, Woojin and Marrone, Daniel P. and Perez, Laura M.},
abstractNote = {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 k{lambda}), allowing us to trace spatial scales from 10{sup 2} to 10{sup 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 k{lambda}, where the contribution from the envelope should be negligible, assuming an unresolved disk. The resulting disk masses range from 0.04 M{sub sun} to 1.7 M{sub sun}, with a mean of approximately 0.2 M{sub sun}. Our high-resolution maps are also sensitive to binary or multiple sources with separations {approx}> 250 AU, but significant evidence of multiplicity on scales <2000 AU is seen in only one source.},
doi = {10.1088/0067-0049/195/2/21},
journal = {Astrophysical Journal, Supplement Series},
issn = {0067-0049},
number = 2,
volume = 195,
place = {United States},
year = {2011},
month = {8}
}