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The BLAST survey of the vela molecular cloud: physical properties of the dense cores in Vela-D

Olmi, Luca, Ade, Peter A. R., Anglés-Alcázar, Daniel, Bock, James J., Chapin, Edward L., De Luca, Massimo, Devlin, Mark J., Dicker, Simon, Elia, Davide, Fazio, Giovanni G., Giannini, Teresa, Griffin, Matthew Joseph, Gundersen, Joshua O., Halpern, Mark, Hargrave, Peter Charles, Hughes, David H., Klein, Jeff, Lorenzetti, Dario, Marengo, Massimo, Marsden, Gaelen, Martin, Peter G., Massi, Fabrizio, Mauskopf, Philip Daniel, Netterfield, Calvin B., Patanchon, Guillaume, Rex, Marie, Salama, Alberto, Scott, Douglas, Semisch, Christopher, Smith, Howard A., Strafella, Francesco, Thomas, Nicholas, Truch, Matthew D. P., Tucker, Carole Elizabeth, Tucker, Gregory S., 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. 10.1088/0004-637X/707/2/1836

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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 deg2, 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

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Uncontrolled Keywords: Balloons ; ISM: clouds ; Stars: formation ; Submillimeter
Publisher: American Astronomical Society
ISSN: 0004-637X
Last Modified: 11 Feb 2021 02:34

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