"Starless" Super-Jeans Cores in Four Gould Belt Clouds

Abstract

From a survey of 729 cores based on JCMT/SCUBA data, we present an analysis of 17 candidate starless cores with masses that exceed their stable Jeans masses. We re-examine the classification of these super-Jeans cores using Spitzer maps and find that 3 are re-classified as protostellar, 11 have ambiguous emission near the core positions, and 3 appear to be genuinely starless. We suggest the 3 starless and 11 undetermined super-Jeans cores represent excellent targets for future observational and computational study to understand the evolution of dense cores and the process of star formation.

Accepted for publication in ApJL

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• The JCMT Gould Belt Survey: A First Look at Southern Orion A with SCUBA-2
• JCMT POL-2 and BISTRO Survey observations of magnetic fields in the L1689 molecular cloud
• ALMA Observations of Starless Core Substructure in Ophiuchus
• How Starless Are Starless Cores?
• Jeans instability criterion modified by external tidal field
• Synthetic Observations of the Evolution of Starless Cores in a Molecular Cloud Simulation: Comparisons with JCMT Data and Predictions for ALMA
• Correlating Infall with Deuterium Fractionation in Dense Cores
• Contraction Signatures Toward Dense Cores in the Perseus Molecular Cloud
• An Observed Lack of Substructure in Starless Cores II: Super-Jeans Cores
• Far-infrared/sub-millimetre properties of pre-stellar cores L1521E, L1521F and L1689B as revealed by the Herschel SPIRE instrument -- I. Central positions
• The CMF as provenance of the stellar IMF ?
• Why do some cores remain starless ?
• The JCMT BISTRO Survey: The magnetised evolution of star-forming cores in the Ophiuchus Molecular Cloud interpreted using Histograms of Relative Orientation