SIMBAD references

A survey of 158 sources (bipolar outflows and methanol masers) was carried out in the CS(2-1) and C³⁴S(2-1) lines to measure and compare densities in a large number of bipolar outflows and in Class I and Class II methanol masers, both associated with and unrelated to bipolar outflows. The statistical characteristics of the regions, forming Class I methanol masers differ from those both in the centres of bipolar outflows and in the regions forming Class II methanol masers. It is possible that physical conditions in bipolar outflows are closer to physical conditions of Class II methanol masers.