Interstellar scattering of the radio source 2013+370

Details Interstellar scattering of the radio source 2013+370 Interstellar scattering of the radio source 2013+370

Sep 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...332..346s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 332, Sept. 1, 1988, p. 346-353. Research supported by the Alfred P. Sloan F

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Extragalactic Radio Sources, Interstellar Extinction, Plasma Turbulence, Scattering, Very Long Base Interferometry, Computational Astrophysics, Stellar Spectra, Turbulent Flow

Scientific paper

Results are reported from a six-station 1663-MHz VLBI observation of the radio source 2013+370. The image of this source is dominated by interstellar scattering and is observed to be elliptical, with a major axis (FWHM) of 17 marcsec and an axial ratio of of 0.70. A fit of the observations to a model visibility function yields a value for alpha, the spectral index of the power-law density irregularity spectrum, of alpha=3.79 + or - 0.05. Corrections for the finite angular size of the source would probably produce a downward revision of alpha. The present observations are consistent with the interstellar density spectrum being close to Kolmogoroff for those scales which determine the angular broadening.

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