The Atmospheric Transmission at La-Silla at 230-GHZ

Details The Atmospheric Transmission at La-Silla at 230-GHZ The Atmospheric Transmission at La-Silla at 230-GHZ

Sep 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982msngr..29...20b&link_type=abstract

The Messenger, No.29, P. 20, 1982

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Scientific paper

From April to November 1981, ESO La Silla was host to a team of observers from the Netherlands, forming the "CO group". During this time they applied themselves to detecting radiation of the CO moleeule at 230 GHz, using the CAT and their own heterodyne (sub-)millimetre wave receiver. In general the importance of CO observations lies in the fact that CO is, after molecular hydrogen, the most abundant moleeule in interstellar space while its (dipole) rotational transitions can be much more easily detected than the very weak (quadrupole) rotational transitions of H2; the rotational levels of CO are believed to be excited by collisions with other particles, mostly H2, and therefore, by studying the distribution and kinematics of CO one gets indirect information on those properties of H2.

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