Abstract
We present interferometric observations of the W51 region at 2.7 mm and 3.3 mm with the Berkeley-Illinois-Maryland Association Array. The lines of CH 3 CN (J = 6 − 5, K = 0,1,2,3,4), CH3OH (15 −2 −15 1 E), HCOOCH 3 -A (7 1,6 − 6 1,5 ), HCOOCH3 -E (7 1,6 − 6 1,5 ) and 13 CS (2-1) as well as the 2.7 mm continuum toward W51 have been observed. The derived total beam-averaged column densities NT and fractional abundances of CH 3 CN, CH 3 OH, HCOOCH 3 and 13 CS in W51 cores have been obtained.
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