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-Alczar, 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 MarsdenPeter 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, Donald V. Wiebe

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


The Balloon-borne Large-Aperture Submillimeter Telescope (BLAST) carried out a 250, 350, and 500μm 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.

Original languageEnglish (US)
Pages (from-to)1836-1851
Number of pages16
JournalAstrophysical Journal
Issue number2
StatePublished - 2009
Externally publishedYes


  • Balloons
  • ISM: clouds
  • Stars: formation
  • Submillimeter

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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