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The bursting variability of 6.7 GHz methanol maser of G33.641-0.228

Published online by Cambridge University Press:  16 July 2018

Y. Kojima ,
K. Fujisawa  and
K. Motogi
Y. Kojima
Affiliation:
Graduated School of Sciences and Technology for Innovation, Yamaguchi University, Yoshida 1677-1, Yamaguchi, 753-8512Japan
K. Fujisawa
Affiliation:
Graduated School of Sciences and Technology for Innovation, Yamaguchi University, Yoshida 1677-1, Yamaguchi, 753-8512Japan
K. Motogi
Affiliation:
Graduated School of Sciences and Technology for Innovation, Yamaguchi University, Yoshida 1677-1, Yamaguchi, 753-8512Japan
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Abstract

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From 2014 to 2015, we conducted a total of 469 days observation of the 6.7 GHz methanol maser in a star forming region G33.641-0.228, known to be a bursting maser source. As a result, eleven bursts were detected. On MJD 57364, the flux density grew by more than six times w.r.t the day before. Moreover, during the largest burst, the flux density repeatedly increased and decreased rapidly with time-scale as short as 0.24 day. Since these characteristics of the burst are similar to the solar burst, we speculate that the burst of the 6.7 GHz methanol maser in G33.641-0.228 might occur with a similar mechanism of the solar burst.

Keywords

masersstars : formation
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 13 , Symposium S336: Astrophysical Masers: Unlocking the Mysteries of the Universe , September 2017 , pp. 336 - 337
Copyright
Copyright © International Astronomical Union 2018 

References

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