Study of Global Star formation in Our Galaxy by servey observation of Emission lines of Anmonia molecules

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In order to upgrade Hokkaido University 11m radio telescope, we have made the new radio receiver of 22Ghz, the hone for 22GHz receiver, the degital spctrum analyzers, and the control system of Hokkaido university 11m radio telescope. Purpose of our study is to investigate of property of global star formation in our galaxy, by observation of Anmonia molecules whic is in dense cores in molecular clouds in our galaxy. In this study, we will observe four, different spectral lines from highly exitation of rotational states of Anmonia molecules to know rotational excitation temperature, since study of density and temperature is very important to study star formation in molecular clouds.We have made the test observation of Anmonia molecules in the Cygnus region which is in the spiral arm in our Galaxy. We have succeeded to detect (J,K)=(1,1),(2,2) and (3,3)lines. By using the intensity of these lines, we deduce temperature of molecules which is 20K and is consistent with previous observation.We will make survey observation of Anmolia molecules in dense molecular clouds in our galaxy to study global star formation.