AAS 205th Meeting, 9-13 January 2005
Session 109 Surveys for Young Stars Down to the Brown Dwarf Limit
Poster, Wednesday, January 12, 2005, 9:20am-6:30pm, Exhibit Hall

Previous   |   Session 109   |   Next

[109.03] An Update on the MIT Haystack Observatory Methanol Maser Study

C. Battersby, P. Pratap (MIT Haytack Observatory)

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.

Previous   |   Session 109   |   Next

Bulletin of the American Astronomical Society, 36 5
© 2004. The American Astronomical Society.