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Full-polarization maps of OH main-line masers in the W51 and G351.78-0.54 star-forming regions

Published online by Cambridge University Press:  03 August 2017

Alice L. Argon ,
Mark J. Reid  and
Karl M. Menten
Alice L. Argon
Affiliation:
Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, U.S.A.
Mark J. Reid
Affiliation:
Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, U.S.A.
Karl M. Menten
Affiliation:
Max-Planck-Institut für Radioastronomie, Bonn, Germany

Abstract

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Full-polarization spectral-line VLBA observations were made of the ground state, main-line, 2π3/2J = 3/2 OH masers in two Galactic star-forming regions: the “e1”/ “e2” region of W51 and G351.78-0.54. Two especially interesting results are presented. (1) Two of the 27 Zeeman pairs in W51 were found to be associated with unusually strong magnetic fields (≈ 20 mG), more than twice as strong as for any previously reported OH maser. (2) G351.78-0.54 was found to exhibit a high degree of linear polarization (up to 61%), which constrains the three dimensional structure of its magnetic field.

Type
Part 4. Polarization and Magnetic Fields
Information
Symposium - International Astronomical Union , Volume 206: Cosmic Masers: From Protostars to Blackholes , 2002 , pp. 367 - 370
Copyright
Copyright © Astronomical Society of the Pacific 2002 

References

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