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We present the Green Bank 100m Telescope (GBT) mapping observations of CS1-0, and the Submillimeter Array (SMA) 157-pointings mosaic of the 0.86 mm dustcontinuum emission as well as several warm and dense gas tracers, in thecentral ~20 pc area in Galactic Center. The unprecedentedly large field-of-viewand the high angular resolution of our SMA dust image allow the identificationof abundant 0.1-0.2 pc scale dense gas clumps. We found that in the GalacticCenter, the Class I methanol masers are excellently correlated with the densegas clumps. However, on the ~0.1 pc scale, these dense gas clumps still have aextremely large linewidth (FWHM~10-20 km/s). Simple calculations suggest thatthe identified clumps can be possibly the pressurized gas reservoir feeding theformation of 1-10 solar-mass stars. These gas clumps may be the most promisingcandidates for ALMA to resolve the high-mass star-formation in the Galacticcenter.

The Processing of the Clumpy Molecular Gas in the Galactic Center and the Star-Formation