Olmi, Luca and Ade, Peter A. R. and Anglés-Alcázar, Daniel and Bock, James J. and Chapin, Edward L. and De Luca, Massimo and Devlin, Mark J. and Dicker, Simon and Elia, Davide and Fazio, Giovanni G. and Giannini, Teresa and Griffin, Matthew and Gundersen, Joshua O. and Halpern, Mark and Hargrave, Peter C. and Hughes, David H. and Klein, Jeff and Lorenzetti, Dario and Marengo, Massimo and Marsden, Gaelen and Martin, Peter G. and Massi, Fabrizio and Mauskopf, Philip and Netterfield, Calvin B. and Patanchon, Guillaume and Rex, Marie and Salama, Alberto and Scott, Douglas and Semisch, Christopher and Smith, Howard A. and Strafella, Francesco and Thomas, Nicholas and Truch, Matthew D. P and Tucker, Carole and Tucker, Gregory S. and Viero, Marco P. and Wiebe, Donald V. (2009) The Blast Survey of the Vela Molecular Cloud: Physical Properties of the Dense Cores in Vela-D. Astrophysical Journal, 707 (2). pp. 1836-1851. ISSN 0004-637X http://resolver.caltech.edu/CaltechAUTHORS:20100107-142047477
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The Balloon-borne Large-Aperture Submillimeter Telescope (BLAST) carried out a 250, 350, and 500 μm survey of the galactic plane encompassing the Vela Molecular Ridge, with the primary goal of identifying the coldest dense cores possibly associated with the earliest stages of star formation. Here, we present the results from observations of the Vela-D region, covering about 4 deg^2, in which we find 141 BLAST cores. We exploit existing data taken with the Spitzer MIPS, IRAC, and SEST-SIMBA instruments to constrain their (single-temperature) spectral energy distributions, assuming a dust emissivity index β = 2.0. This combination of data allows us to determine the temperature, luminosity, and mass of each BLAST core, and also enables us to separate starless from protostellar sources. We also analyze the effects that the uncertainties on the derived physical parameters of the individual sources have on the overall physical properties of starless and protostellar cores, and we find that there appear to be a smooth transition from the pre- to the protostellar phase. In particular, for protostellar cores we find a correlation between the MIPS24 flux, associated with the central protostar, and the temperature of the dust envelope. We also find that the core mass function of the Vela-D cores has a slope consistent with other similar (sub)millimeter surveys.
|Additional Information:||© 2009 American Astronomical Society. Print publication: Issue 2 (2009 December 20); received 2009 September 2; accepted for publication 2009 November 3; published 2009 December 7. We acknowledge the support of NASA through grant numbersNAG5- 12785,NAG5-13301, and NNGO-6GI11G, the NSF Office of Polar Programs, the Canadian Space Agency, the Natural Sciences and Engineering Research Council (NSERC) of Canada, and the UK Science and Technology Facilities Council (STFC). This work is also based, in part, on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA. Support for this work was provided by NASA through an award issued by JPL/Caltech. L.O. acknowledges partial support by the Puerto Rico Space Grant Consortium and by the Decanato de Estudios Graduados e Investigaci´on of the University of Puerto Rico.|
|Subject Keywords:||balloons; ISM: clouds; stars: formation; submillimeter|
|Official Citation:||The Blast Survey of the Vela Molecular Cloud: Physical Properties of the Dense Cores in Vela-D Luca Olmi, Peter A. R. Ade, Daniel Anglés-Alcázar, James J. Bock, Edward L. Chapin, Massimo De Luca, Mark J. Devlin, Simon Dicker, Davide Elia, Giovanni G. Fazio, Teresa Giannini, Matthew Griffin, Joshua O. Gundersen, Mark Halpern, Peter C. Hargrave, David H. Hughes, Jeff Klein, Dario Lorenzetti, Massimo Marengo, Gaelen Marsden, Peter G. Martin, Fabrizio Massi, Philip Mauskopf, Calvin B. Netterfield, Guillaume Patanchon, Marie Rex, Alberto Salama, Douglas Scott, Christopher Semisch, Howard A. Smith, Francesco Strafella, Nicholas Thomas, Matthew D. P. Truch, Carole Tucker, Gregory S. Tucker, Marco P. Viero, and Donald V. Wiebe 2009 ApJ 707 1836-1851 doi: 10.1088/0004-637X/707/2/1836|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Jason Perez|
|Deposited On:||08 Jan 2010 20:39|
|Last Modified:||26 Dec 2012 11:40|
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