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The variability of 6.7 and 12.2 GHz methanol masers

Published online by Cambridge University Press:  01 March 2007

Leszek P. Błaszkiewicz ,
A. Mikuć  and
A. J. Kus
Leszek P. Błaszkiewicz
Affiliation:
Dept. of Math. and IT Sciences, University of Warmia and Mazury, Olsztyn, Poland
A. Mikuć
Affiliation:
Dept. of Math. and IT Sciences, University of Warmia and Mazury, Olsztyn, Poland
A. J. Kus
Affiliation:
Centre for Astronomy, Nicolaus Copernicus University, Torun, Poland
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Abstract

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Eight strong methanol masers were monitored using the 32-m Torun radio telescope at 6.7 and 12.2 GHz. The observations were taken in the period 2003 December to 2005 July at 1–2 week intervals. We have noted strong variability of single features but did not notice spectacular spectral shape changes. From our results we designated two groups of variability for corresponding features: Those where the 12.2 GHz flux density variations follow those at 6.7 GHz, and those where the 12.2 GHz flux density variations are opposite to 6.7 GHz.

Keywords

masersradio lines: ISMISM: moleculestechniques: spectroscopic
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S242: Astrophysical Masers and their Environments , March 2007 , pp. 142 - 143
Copyright
Copyright © International Astronomical Union 2008

References

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