Hostname: page-component-7c8c6479df-7qhmt Total loading time: 0 Render date: 2024-03-29T10:09:34.396Z Has data issue: false hasContentIssue false

Short-term variations in Class I methanol masers?

Published online by Cambridge University Press:  01 March 2007

Preethi Pratap
Affiliation:
MIT Haystack Observatory, Westford, MA 01886 email: ppratap@haystack.mit.edu
Vladimir Strelnitski
Affiliation:
Maria Mitchell Observatory, Nantucket, MA email: vladimir@mmo.org
Samantha Hoffman
Affiliation:
MIT Haystack Observatory, Westford, MA 01886 email: ppratap@haystack.mit.edu
Jenna Lemonias
Affiliation:
Maria Mitchell Observatory, Nantucket, MA email: vladimir@mmo.org
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

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.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2008

References

Felli, M., Massi, F., Robberto, M., & Cesaroni, R.A&A 453, 911Google Scholar
Goedhart, S., Gaylard, M. J., & vander Walt, D. J. der Walt, D. J.M.N.R.A.S, 355, 553CrossRefGoogle Scholar
Kalenskii, S. V., Promyslov, V. G., Slysh, V. I., Bergman, P. & Winnberg, A. 2005, Astronomy Reports 50, 289CrossRefGoogle Scholar
Kogan, L. & Slysh, V. 1998, Ap.J. 497, 800CrossRefGoogle Scholar
Kurtz, S., Hofner, P. & Alvarez, C. V. 2004, Ap.J.S. 155, 149CrossRefGoogle Scholar
Wiesemeyer, H., Thum, C., & Walmsley, C. M.A&A 428, 479Google Scholar