TY - JOUR
T1 - The blast survey of the vela molecular cloud
T2 - Physical properties of the dense cores in vela-d
AU - Olmi, Luca
AU - Ade, Peter A.R.
AU - Anglés-Alczar, Daniel
AU - Bock, James J.
AU - Chapin, Edward L.
AU - De Luca, Massimo
AU - Devlin, Mark J.
AU - Dicker, Simon
AU - Elia, Davide
AU - Fazio, Giovanni G.
AU - Giannini, Teresa
AU - Griffin, Matthew
AU - Gundersen, Joshua O.
AU - Halpern, Mark
AU - Hargrave, Peter C.
AU - Hughes, David H.
AU - Klein, Jeff
AU - Lorenzetti, Dario
AU - Marengo, Massimo
AU - Marsden, Gaelen
AU - Martin, Peter G.
AU - Massi, Fabrizio
AU - Mauskopf, Philip
AU - Netterfield, Calvin B.
AU - Patanchon, Guillaume
AU - Rex, Marie
AU - Salama, Alberto
AU - Scott, Douglas
AU - Semisch, Christopher
AU - Smith, Howard A.
AU - Strafella, Francesco
AU - Thomas, Nicholas
AU - Truch, Matthew D.P.
AU - Tucker, Carole
AU - Tucker, Gregory S.
AU - Viero, Marco P.
AU - Wiebe, Donald V.
PY - 2009
Y1 - 2009
N2 - 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.
AB - 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.
KW - Balloons
KW - ISM: clouds
KW - Stars: formation
KW - Submillimeter
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U2 - 10.1088/0004-637X/707/2/1836
DO - 10.1088/0004-637X/707/2/1836
M3 - Article
AN - SCOPUS:72849123171
SN - 0004-637X
VL - 707
SP - 1836
EP - 1851
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 2
ER -