Survey of bipolar outflows and methanol masers in the (CS)-S-32 (2-1) and (CS)-S-34 (2-1) lines in the Northern sky

A survey of 158 sources (bipolar outflows and methanol masers) was carried out in the CS(2 - 1) and (CS)-S-34(2 - 1) lines to measure and compare dens ities in a large number of bipolar outflows and in Class I and Class II met hanol masers, both associated with and unrelated to bipolar outflows. The s tatistical characteristics of the regions, forming Class I methanol masers differ from those both in the centres of bipolar outflows and in the region s forming Class II methanol masers. It is possible that physical conditions in bipolar outflows are closer to physical conditions of Class II methanol masers.