Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...20510903b&link_type=abstract
American Astronomical Society Meeting 205, #109.03; Bulletin of the American Astronomical Society, Vol. 36, p.1532
Astronomy and Astrophysics
Astronomy
Scientific paper
Class I methanol masers have been detected in star forming regions, and may be a critical link in detecting very early star formation. Class I methanol masers are pumped by collisional excitation followed by spontaneous radiative decay and often occur in the outflows of young stars. The Haystack 37m antenna has been used to conduct a search for Class I methanol masers at three transitions towards the known star-forming regions of S255, S235, OMC2, and W75N. The maser position and the surrounding region were mapped at three transitions of Class I methanol: 25 GHz, 36 GHz and 44 GHz. Methanol masers that are coincident in position and velocity between 36 GHz and 44 GHz have been found, as well as emission at 44 GHz with no corresponding emission at 36 or 25 GHz. There have been no detections at 25 GHz. A comparison of line widths is also presented. These data will facilitate modeling of the pumping mechanism of these masers and the surrounding physical environment.
Battersby Cara
Pratap Preethi
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