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Short-term variations in Class I methanol masers?

Published online by Cambridge University Press:  01 March 2007

Preethi Pratap ,
Vladimir Strelnitski ,
Samantha Hoffman  and
Jenna Lemonias
Preethi Pratap
Affiliation:
MIT Haystack Observatory, Westford, MA 01886 email: [email protected]
Vladimir Strelnitski
Affiliation:
Maria Mitchell Observatory, Nantucket, MA email: [email protected]
Samantha Hoffman
Affiliation:
MIT Haystack Observatory, Westford, MA 01886 email: [email protected]
Jenna Lemonias
Affiliation:
Maria Mitchell Observatory, Nantucket, MA email: [email protected]
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Abstract

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Class I methanol masers are found near regions of high-mass star formation and are pumped by collisions. Some indication of long-term variability in these masers has previously been reported (Kurtz et al. 2004). Here we will present evidence for variations in the intensity of the Class I methanol masers at 44 GHz on much shorter timescales. We present preliminary results of the observation of the 44 GHz Class I methanol transition toward sources in the DR21 region that indicates variability on timescales of days to possibly hours.

Keywords

masersstars:formation
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S242: Astrophysical Masers and their Environments , March 2007 , pp. 34 - 36
Copyright
Copyright © International Astronomical Union 2008

References

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