The CO High-Resolution Survey (COHRS) maps the 12CO (J = 3 → 2) transition in the Galactic plane, between |b| <= 0. 5° and 10° < l < 65°. It has a spatial resolution of 16” and a velocity resolution of 1 km/s. It is intended as a complement to the BGPS, ATLASGAL Hi-GAL, and JCMT surveys of the Galactic plane. The 12CO (J = 3 → 2) is a particularly good tracer of the warmer (10-50 K) material of moderate density (10^4 cm-3) around cores. It is also a good tracer of outflow activity, which should aid morphological studies of bubbles and filaments.
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