608 MHz VLBI observations of the compact double radio source 2050 + 364 - Constraints on interstellar scattering

Details 608 MHz VLBI observations of the compact double radio source 2050 + 364 - Constraints on interstellar scattering 608 MHz VLBI observations of the compact double radio source 2050 + 364 - Constraints on interstellar scattering

Feb 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...404..197f&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 404, no. 1, p. 197-205.

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Electron Scattering, Plasma Turbulence, Radio Sources (Astronomy), Very Long Base Interferometry, Computational Astrophysics, Electron Density (Concentration), Interstellar Matter, Power Spectra

Scientific paper

We report the results of second epoch 608 MHz VLBI observations of the compact double radio source 2050 + 364. Both components of the double have observed angular sizes which scale as theta varies as lambda-squared, a result expected for angular broadening by intervening plasma turbulence. The magnitude of the observed broadening is the same for both components and is only moderately in excess of that expected from a diffuse component of interstellar turbulence. Refraction appears to be small for this line of sight. The lack of significant change in component separation since the first epoch places constraints on refractive image wander of the individual components. The observed differential wander of 4 +/- 4 mass is much smaller than the diffractive scattering size and is consistent with an index of an assumed power-law turbulent electron density power spectrum with spectral index alpha less than 3.8 for those scales which determine the wander.

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