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Measurements of Interstellar Scattering in the Cygnus Region

Published online by Cambridge University Press:  03 August 2017

S. Spangler ,
A. Fey  and
R. Mutel
S. Spangler
Affiliation:
Department of Physics and Astronomy, University of Iowa, Iowa City, IA 52242
A. Fey
Affiliation:
Department of Physics and Astronomy, University of Iowa, Iowa City, IA 52242
R. Mutel
Affiliation:
Department of Physics and Astronomy, University of Iowa, Iowa City, IA 52242

Abstract

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We report progress on a study of interstellar scattering in the direction of the constellation Cygnus. A high quality, 1663 MHz VLBI image has been obtained of the radio source 2013+370, whose structure at this frequency is dominated by scattering. The visibility function indicates that the spectral index of the interstellar density irregularities is between 3.7 and 4.0, with the higher value being somewhat more likely. Another project consists of multifrequency observations of eight sources in this region. Pronounced changes in the scattering are observed for sources separated by only a few degrees.

Type
Galactic
Information
Symposium - International Astronomical Union , Volume 129: The Impact of VLBI on Astrophysics and Geophysics , 1988 , pp. 303 - 304
Copyright
Copyright © Reidel 1988