A general catalog of class I methanol masers

Details A general catalog of class I methanol masers A general catalog of class I methanol masers

Jul 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007arep...51..519v&link_type=abstract

Astronomy Reports, Volume 51, Issue 7, pp.519-530

Astronomy and Astrophysics

Astronomy

8

98.58.Ec, 95.80.+P

Scientific paper

A catalog of class I methanol masers discovered so far in the Southern and Northern hemispheres is presented. The catalog contains 160 sources. A statistical analysis shows that, within 2’ of the telescope pointing (which corresponds approximately to the field of view of single antennas used in search surveys), 50% of class I methanol masers are associated with objects characteristic of active starforming regions: IRAS sources, ultracompact HII regions, and dense gas—dust clouds, as well as OH and H2O interstellar masers. At the same time, bipolar outflows (which could play an active part in pumping the methanol masers) are associated with fewer than 25% of class I methanol masers. In 72% of cases, class I methanol masers are associated with class II methanol maser sources. These results suggest that methanol maser condensations are more appropriately classified by the transition type (that is, the pumping mechanism) than their association with other astronomical objects.

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