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We discuss high-angular resolution observations of ammonia toward fourcandidate high-mass starless cores (HMSCs). The cores were identified by theBalloon-borne Large Aperture Submillimeter Telescope (BLAST) during its 2005survey of the Vulpecula region where 60 compact sources were detectedsimultaneously at 250, 350, and 500 micron. Four of these cores, with noIRAS-PSC or MSX counterparts, were observed with the NRAO Very Large Array(VLA) in the NH3(1,1) and (2,2) spectral lines. Our observations indicate thatthe four cores are cold (Tk <~ 14K) and show a filamentary and/or clumpystructure. They also show a significant velocity substructure within ~1km/s.The four BLAST cores appear to be colder and more quiescent than otherpreviously observed HMSC candidates, suggesting an earlier stage of evolution.

High Angular Resolution Observations of Four Candidate BLAST High-Mass Starless Cores