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Interpreting the nature of starless cores has been a prominent goal in starformation for many years. In order to characterise the evolutionary stages ofthese objects, we perform synthetic observations of a numerical simulation of aturbulent molecular cloud. We find that nearly all cores that we detect areassociated with filaments and eventually form protostars. We conclude thatobserved starless cores which appear Jeans unstable are only marginally largerthan their respective Jeans masses (within a factor of 3). We note single dishobservations such as those performed with the JCMT appear to miss significantcore structure on small scales due to beam averaging. Finally, we predict thatinterferometric observations with ALMA Cycle 1 will resolve the important smallscale structure, which has so far been missed by mm-wavelength observations.

Synthetic Observations of the Evolution of Starless Cores in a Molecular Cloud Simulation: Comparisons with JCMT Data and Predictions for ALMA