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Title:
OH Masers in G11.904-0.141
Authors:
Fish, Vincent L.
Affiliation:
AA(Jansky Fellow, National Radio Astronomy Observatory, Socorro, NM 87801; )
Publication:
The Astrophysical Journal, Volume 665, Issue 2, pp. L159-L161. (ApJL Homepage)
Publication Date:
08/2007
Origin:
UCP
ApJ Keywords:
ISM: individual (G11.904-0.141), ISM: Molecules, Masers, Radio Lines: ISM, Stars: Formation
DOI:
10.1086/521400
Bibliographic Code:
2007ApJ...665L.159F

Abstract

The massive star-forming region G11.904-0.141 is one of only 11 sources to show maser emission in the highly excited 13441 MHz transition of OH. VLBA observations of the 1665, 1667, 4765, and 13441 MHz transitions of OH toward G11.904-0.141 are presented. Masers are detected at 1665, 1667, and 4765 MHz, but the 13441 MHz masers are not detected. Consistent magnetic field strengths of approximately +3.5 mG are detected in the ground-state masers, in contrast with a possible -3.0 mG magnetic field previously detected at 13441 MHz. The variable 13441 MHz masers may be associated with an outflow.
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