Multifrequency Method for Mapping Active Galactic Nuclei with Allowance for the Frequency-Dependent Image Shift
Anisa T. Bajkova, Alexander B. Pushkarev
TL;DR
This paper introduces a generalized multifrequency synthesis algorithm that accounts for frequency-dependent image shifts in VLBA data, improving the accuracy of active galactic nuclei imaging and spectral-index mapping.
Contribution
The paper presents a novel multifrequency synthesis algorithm with spectral correction based on the maximum entropy method, specifically addressing frequency-dependent image shifts in VLBI data.
Findings
Successful application to multiple radio sources
Enhanced accuracy in spectral-index mapping
Effective correction of frequency-dependent image shifts
Abstract
We consider the problem of multifrequency VLBA image synthesis and spectral-index mapping for active galactic nuclei related to the necessity of taking into account the frequency-dependent image shift. We describe our generalized multifrequency synthesis algorithm with a spectral correction based on the maximum entropy method. The results of our processing of multifrequency VLBI data for the radio sources J2202+4216, J0336+3218, and J1419+5423 are presented.
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