2-6 September 2024
CJD Bonn Castell
Europe/Berlin timezone
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Contribution

Dynamic VLBI Imaging with Resolve

Speakers

  • Dr. Jakob KNOLLMÜLLER

Primary authors

Content

The high resolution of Very Long Baseline Interferometry (VLBI) allows us to access dynamic aspects of our Universe. However, the data are typically sparse, and certain sources, such as Sgr A*, can change significantly during observations, making traditional snapshot imaging techniques inadequate. In this talk, I will present how to use the resolve framework for dynamic imaging of VLBI data. This Bayesian method leverages adaptive Gaussian Processes and Variational Inference for data-driven self-regularization, enabling the reconstruction of spatiotemporal representations from sparsely sampled data. Rather than producing a single reconstruction, resolve generates a probability distribution, allowing for the quantification of uncertainty in the results. I will demonstrate the effectiveness of this approach with examples using Event Horizon Telescope (EHT)-like data. These examples will show how resolve captures the dynamic evolution of astronomical sources over time, providing a more comprehensive understanding of these processes.