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First EVN Maps of 6-GHz OH Lines in Star Forming Regions

Published online by Cambridge University Press:  12 April 2016

J.-F. Desmurs  and
A. Baudry
J.-F. Desmurs
Affiliation:
Observatoire de Bordeaux, BP 89, 33270 Floirac, FranceJIVE / Observatorio Astronómico Nacional, 28800 Alcalá de Henares, Spain
A. Baudry
Affiliation:
Observatoire de Bordeaux, BP 89, 33210 Floirac, France

Abstract

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We have used 3 antennas of the EVN to observe in 6 star-forming regions simultaneously, and for the first time, the 2 main lines of the J=5/2 state of OH with right and left circularly polarized feeds. Maser features and Zeeman pairs are identified by searching for emission over adjacent channels, and adjacent positions (within one synthesized beam) in both polarizations after we had mapped and used one selected simple channel as a reference. The magnetic field strength is thus estimated from the Zeeman pairs identified in our OH maps. We briefly present results obtained for W3(OH), ON1, and W51.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 164: Radio Emission from Galactic and Extragalactic Compact Sources , 1998 , pp. 371 - 372
Copyright
Copyright © Astronomical Society of the Pacific 1998

References

Desmurs, J.-F., Baudry, A., & Graham, D. 1997. Vistas in Astronomy, (special issue), eds. Garrett, M. & Colomer, F., 41, 169–184.Google Scholar
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