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An OH maser flare with a strong magnetic field in W75N

Published online by Cambridge University Press:  01 March 2007

V. I. Slysh  and
V. Migenes
V. I. Slysh
Affiliation:
Astro Space Center, Lebedev Physical Institute, 84/32 Profsoyuznaya, Moscow, 117997 email: [email protected]
V. Migenes
Affiliation:
Department of Astronomy, University of Guanajuato, P.O. Box 144, Guanajuato, GTO. Mexico 36000, email: [email protected]
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Abstract

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A flare of OH maser emission was discovered in W75N in 2000. Its location was determined with the VLBA to be within 110 AU from one of the ultra-compact HII regions, VLA2. The flare consisted of several maser spots. Four of the spots were found to form Zeeman pairs, all of them with a magnetic field strength of about 40 mG. This is the highest ever magnetic field strength found in OH masers, an order of magnitude higher than in typical OH masers. We discuss the possible source for the enhanced magnetic field and its relation to the flare event.

Keywords

ISM:magnetic fieldsstars: flaremaser
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S242: Astrophysical Masers and their Environments , March 2007 , pp. 166 - 167
Copyright
Copyright © International Astronomical Union 2008

References

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