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Astron. Astrophys. Suppl. Ser. 139, 257-275

Survey of bipolar outflows and methanol masers in the C32S (2-1) and C34S (2-1) lines in the Northern sky[*]

G.M. Larionov1 - I.E. Val'tts1 - A. Winnberg2 - L.E.B. Johansson2 - R.S. Booth2 - V.V. Golubev3

Send offprint request: A. Winnberg

1 - Astro Space Center of Lebedev Physical Institute, Profsoyuznaya 84/32, 117810 Moscow, Russia
2 - Onsala Space Observatory, S-439 92 Onsala, Sweden
3 - Moscow State University, Physical Faculty, Department of Astronomy, Universitetskii pr. 13, 119899 Moscow, Russia

Received February 25, 1998; accepted July 5, 1999


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.

Key words: ISM: general -- ISM: jets and outflows, molecules

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