PoS - Proceedings of Science
Volume 399 - European VLBI Network Mini-Symposium and Users' Meeting 2021 (EVN2021) - Galactic
A study of the Milky Way scattering properties based on multi-frequency VLBA observations of the AGN core sizes
T. Koryukova*, A. Pushkarev, A. Plavin and Y.Y. Kovalev
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Pre-published on: February 24, 2022
Published on: May 24, 2022
We present the results on the analysis of scattering properties of the Galaxy, based on multi-frequency (1.4-86 GHz) Very Long Baseline Interferometry (VLBI) data of active galactic nuclei (AGN) over the entire sky, with the exception of the region of far southern latitudes of the celestial sphere. The data of simultaneous observations at two frequencies, 2 and 8 GHz, and non-simultaneous multi-frequency observations of the apparent AGN VLBI jet origin (the core), allowed us to derive the characteristic value of the power-law index for the unscattered and scattered sources. We constructed the first detailed sky distribution map of the radio emission scattering power in the Galaxy and analyzed its properties. The scattered sizes of the cores are found to be significantly larger within the Galactic plane |b|<10 deg.
DOI: https://doi.org/10.22323/1.399.0017
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