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Rapid burst of 6.7 GHz methanol maser in the high mass star region G33.641-0.228

Published online by Cambridge University Press:  16 July 2018

Kārlis Bērziņš ,
Ivar Shmeld  and
Artis Aberfelds
Kārlis Bērziņš
Affiliation:
Engineering Research Institute Ventspils International Radio Astronomy Centre (VIRAC), Ventspils University College, Inzenieru 101, LV-3601, Ventspils, Latvia email: [email protected]
Ivar Shmeld
Affiliation:
Engineering Research Institute Ventspils International Radio Astronomy Centre (VIRAC), Ventspils University College, Inzenieru 101, LV-3601, Ventspils, Latvia email: [email protected]
Artis Aberfelds
Affiliation:
Engineering Research Institute Ventspils International Radio Astronomy Centre (VIRAC), Ventspils University College, Inzenieru 101, LV-3601, Ventspils, Latvia email: [email protected]
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Abstract

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We report another 6.7 GHz methanol maser burst in the high mass star region G33.641-0.228. The flare is in its second component at vLSR = 59.6 km s−1 and was observed in August-September 2016 by VIRAC radio telescope RT-32 in Irbene, Latvia. Several bursts of the second spatial component of G33.641-0.228 have been reported previously by Fujisawa et al. The maximum peak flux density of the source was measured to reach 343 Jy that is 13 times increase from its ground level. Significant oscillations were discovered during the decay phase indicating a more complex burst mechanism that cannot be explained by a simple heating of the region.

Keywords

ISM: moleculeslines and bandsjets and outflowsmagnetic fields
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. 61 - 62
Copyright
Copyright © International Astronomical Union 2018 

References

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