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Birthplace of 6.7 GHz methanol masers

Published online by Cambridge University Press:  21 March 2013

Cong-Gui Gan ,
Xi Chen  and
Zhi-Qiang Shen
Cong-Gui Gan
Affiliation:
Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory Key Laboratory of Radio Astronomy, Chinese Academy of Sciences, China Graduate School of Chinese Academy of Sciences, 100039, China; email: cggan@shao.ac.cn
Xi Chen
Affiliation:
Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory Key Laboratory of Radio Astronomy, Chinese Academy of Sciences, China
Zhi-Qiang Shen
Affiliation:
Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory Key Laboratory of Radio Astronomy, Chinese Academy of Sciences, China
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Abstract

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We performed polarization sensitive VLBI observations of 6.7 GHz methanol masers toward high-mass young stellar objects with clear outflow seen from Spitzer IRAC images in the 4.5 μm band (i.e. EGOs, see Cyganowski et al. 2008) with the EVN to investigate the birthplace of the masers. By comparing direction of the major axis of methanol maser distributions with directions of higher resolution outflow and magnetic field vector, we suggest that the methanol masers toward source G28.83-0.25 may arise from surrounding disk.

Keywords

magnetic fields — masers — polarization — stars: formation
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S292: Molecular Gas, Dust, and Star Formation in Galaxies , August 2012 , pp. 42
Copyright
Copyright © International Astronomical Union 2013

References

Cyganowski, C. J., Whitney, B. A., Holden, E., et al. 2008, AJ, 136, 2391Google Scholar
Dodson, R. & Moriarty, C. D. 2012, MNRAS, 421, 2395Google Scholar