Angular broadening measurements of the sources 1849+005 and 2013+370

Astronomy and Astrophysics – Astronomy

Scientific paper

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Angular Distribution, Interstellar Matter, Radio Scattering, Radio Sources (Astronomy), Cygnus Constellation, Extragalactic Radio Sources, Very Large Array (Vla), Very Long Base Interferometry

Scientific paper

Angular broadening due to interstellar scattering is measured in two radio sources. VLBI observations of 2013+370, obtained with the U.S. network at 1.66 GHz, indicate the presence of quasi-Kolmogorov turbulence (spectral exponent alpha = 3.79 + or - 0.05) along the line of sight. Observations of 1849+005 and 45 other sources near it, obtained with the VLA at 1.46 GHz and 330 MHz, show that this source lies in a near-Galactic-plane region with unusually strong interstellar scattering.

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