Methanol Maser Emission toward Sources with Excess 4.5 um Emission ('Green Fuzzies') in the Galactic Center

Details Methanol Maser Emission toward Sources with Excess 4.5 um Emission ('Green Fuzzies') in the Galactic Center Methanol Maser Emission toward Sources with Excess 4.5 um Emission ('Green Fuzzies') in the Galactic Center

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21732307c&link_type=abstract

American Astronomical Society, AAS Meeting #217, #323.07; Bulletin of the American Astronomical Society, Vol. 43, 2011

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Scientific paper

Understanding the processes occurring in the nuclear disk of our own Galaxy (2 x 1.5 degrees of the Galactic center) is interesting not only for insight into our own Milky Way Galaxy, but also because it is the closest galactic nucleus. The nature of on-going star formation in the nuclear region, however, is not well-understood. In order to better understand this process, we compare how sources with excess 4.5 um emission correlate with 6.7 GHz methanol maser emission in the Galactic center, as well as in the Galactic disk. These excess 4.5 um emission sources, called 'green fuzzies' for how they appear in 3-color IRAC images (with 8 um in red, 4.5 um in green, and 3.6 um in blue), are usually found within infrared dark clouds (IRDCs), and are likely sites of star formation. Because radiatively excited Class II 6.7 GHz methanol masers are also signposts of star formation, determining how they correlate with green fuzzies may provide important insight into the nature of star formation in the Galactic center. In addition, we search for another indicator of star formation toward a subset of Galactic center green fuzzies: collisionally excited, Class I 44 GHz methanol maser emission. Here, we present the results of our study of the correlation of green fuzzies with 6.7 GHz and 44 GHz methanol masers.

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