An observed lack of substructure in starless cores. II. super-jeans cores

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DOIResolve DOI: http://doi.org/10.1088/0004-637X/755/2/178
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TypeArticle
Journal titleThe Astrophysical Journal
ISSN0004-637X
Volume755
Issue2
Article number178
AbstractWe present SMA and CARMA continuum and spectral line observations of five dense cores located in the Perseus and Ophiuchus molecular clouds whose masses exceed their thermal Jeans masses. Three of these cores have previously been identified as being starless and two have been classified as being possibly protostellar. We find that one core is certainly protostellar. The other four cores, however, are starless and undetected in both C 18O and 1.3mm continuum emission. These four starless cores have flat density profiles out to at least ∼0.006pc, which is typical for starless cores in general. Density profiles predicted by some collapse models, especially in the early stages of infall, are consistent with our observations. Archival data reveal that these starless cores have significant non-thermal support against collapse, although they may still be unstable. © 2012. The American Astronomical Society. All rights reserved.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Herzberg Institute of Astrophysics (HIA-IHA)
Peer reviewedYes
NPARC number21269386
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Record identifier1b48001c-e99b-4899-89d7-f976370585d2
Record created2013-12-12
Record modified2016-07-18
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