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

dc.creatorDavid Hughes
dc.date2009-08
dc.date.accessioned2023-07-25T16:23:30Z
dc.date.available2023-07-25T16:23:30Z
dc.identifierhttp://inaoe.repositorioinstitucional.mx/jspui/handle/1009/1350
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7806546
dc.descriptionThe 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 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 proto-stellar 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 proto-stellar cores, and we find that there appear to be a smooth transition from the pre- to the proto-stellar phase. In particular, for proto-stellar 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.
dc.formatapplication/pdf
dc.languageeng
dc.publisherThe Astrophysical Journal
dc.relationcitation:Olmi, L., et al., (2009). The blast survey of the vela molecular cloud: physical properties of the dense cores in vela-D, The Astrophysical Journal. Vol.707(2):1-22
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rightshttp://creativecommons.org/licenses/by-nc-nd/4.0
dc.subjectinfo:eu-repo/classification/Inspec/Submillimeter
dc.subjectinfo:eu-repo/classification/Inspec/Stars: formation
dc.subjectinfo:eu-repo/classification/Inspec/ISM: clouds
dc.subjectinfo:eu-repo/classification/Inspec/Balloons
dc.subjectinfo:eu-repo/classification/cti/1
dc.subjectinfo:eu-repo/classification/cti/21
dc.subjectinfo:eu-repo/classification/cti/21
dc.titleThe blast survey of the vela molecular cloud: physical properties of the dense cores in vela-D
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/acceptedVersion
dc.audiencestudents
dc.audienceresearchers
dc.audiencegeneralPublic


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