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We present a large-scale, interferometric survey of ammonia (1,1) and (2,2)toward the Galactic Center observed with the Australia Telescope Compact Array(ATCA). The survey covers Delta l ~1degree (~150pc) at an assumed distance of8.5 kpc) and Delta b ~0.2degree (~30pc) which spans the region between thesupermassive black hole SgrA* and the massive star forming region SgrB2. Theresolution is ~20'' (~0.8pc) and emission at scales >~2' (>~3.2pc) is filteredout due to missing interferometric short spacings. Consequently, the datarepresent the denser, compact clouds and disregards the large scale, diffusegas. Many of the clumps align with the 100 pc dust ring and mostlyanti-correlate with 1.2cm continuum emission. We present a kinetic temperaturemap of the dense gas. The temperature distribution peaks at ~38K with a widthat half maximum between 18K and 61K (measurements sensitive withinTkin~10-80K). Larger clumps are on average warmer than smaller clumps whichsuggests internal heating sources. Our observations indicate that thecircumnuclear disk ~1.5 pc around SgrA* is supplied with gas by the 20km/smolecular cloud. This gas is substantially cooler than gas ~3-15pc away fromSgrA*. We find a strong temperature gradient across SgrB2. Ammonia columndensities correlate well with SCUBA 850um fluxes, but the relation is shiftedfrom the origin, which may indicate a requirement for a minimum amount of dustto form and shield ammonia. Around the Arches and Quintuplet clusters we findshell morphologies with UV-influenced gas in their centers, followed by ammoniaand radio continuum layers.

ATCA Survey of Ammonia in the Galactic Center: The Temperatures of Dense Gas Clumps between SgrA* and SgrB2