VLBI angular broadening measurements in the Cygnus region

Details VLBI angular broadening measurements in the Cygnus region VLBI angular broadening measurements in the Cygnus region

Feb 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...337..730f&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 337, Feb. 15, 1989, p. 730-738.

Astronomy and Astrophysics

Astronomy

34

Cygnus Constellation, Interstellar Matter, Radio Sources (Astronomy), Very Long Base Interferometry, Electron Density (Concentration), Flux Density, Hydrogen, Line Of Sight, Scattering Functions, Turbulence Effects

Scientific paper

Multifrequency VLBI observations of angular broadening are reported for eight compact radio sources whose lines of sight pass through the Galactic plane in Cygnus. The characteristic lambda-squared dependence of angular size is used to distinguish between scattered and intrinsic structure. The measured angular sizes of four of the eight sources exhibit a lambda-squared dependence, a result consistent with angular broadening by intervening turbulence. Variation in the strength of scattering as a function of position indicates that scattering in the Cygnus region changes by a factor of 2-5 for angular separations of a few degrees. With the exception of one source, the observed angular broadening is confined within a few degrees of the Galactic plane.

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