SIMBAD references

2001MNRAS.324.1102L - Mon. Not. R. Astron. Soc., 324, 1102-1108 (2001/July-2)

Discovery of molecular hydrogen line emission associated with methanol maser emission.


Abstract (from CDS):

We report the discovery of H2 line emission associated with 6.67-GHz methanol maser emission in massive star-forming regions. In our UNSWIRF/AAT observations, H2 1-0 S(1) line emission was found associated with an ultracompact Hii region IRAS 14567-5846 and isolated methanol maser sites in G318.95-0.20, IRAS 15278-5620 and IRAS 16076-5134. Owing to the lack of radio continuum in the latter three sources, we argue that their H2 emission is shock excited, while it is UV-fluorescently excited in IRAS 14567-5846. Within the positional uncertainties of 3arcsec, the maser sites correspond to the location of infrared sources. We suggest that 6.67-GHz methanol maser emission is associated with hot molecular cores, and propose an evolutionary sequence of events for the process of massive star formation.

Abstract Copyright: The Royal Astronomical Society

Journal keyword(s): masers - stars: formation - ISM: lines and bands - ISM: molecules - infrared: ISM

Simbad objects: 10

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