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A Search for Very Compact Structure in 17 OH Masers

Published online by Cambridge University Press:  03 August 2017

A. J. Kemball ,
P. J. Diamond  and
F. Mantovani
A. J. Kemball
Affiliation:
Hartebeesthoek Radio Astronomy Observatory
P. J. Diamond
Affiliation:
Max-Planck Institut für Radioastronomie, Bonn
F. Mantovani
Affiliation:
Istituto di Radioastronomia CNR, Bologna, Italy

Extract

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The apparent spot sizes of OH masers appear to be significantly broadened when seen through the inner galaxy or large extents of the galactic disk (Burke 1968). Bowers et al (1980) found evidence of small-scale structure (≲ 50 mas) in OH sources at distances of less than 5 kpc but this was characteristically absent in very distant sources (≳ 8kpc) at galactic longitudes 1 ≲ 40°. This result is typically explained in terms of interstellar scattering (ISS) by intervening diffuse HII regions.

Type
Galactic
Information
Symposium - International Astronomical Union , Volume 129: The Impact of VLBI on Astrophysics and Geophysics , 1988 , pp. 255 - 256
Copyright
Copyright © Reidel 1988 

References

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