2022
DOI: 10.48550/arxiv.2204.09144
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The science case and challenges of space-borne sub-millimeter interferometry

Leonid I. Gurvits,
Zsolt Paragi,
Ricardo I. Amils
et al.

Abstract: Ultra-high angular resolution in astronomy has always been an important vehicle for making fundamental discoveries. Recent results in direct imaging of the vicinity of the supermassive black hole in the nucleus of the radio galaxy M87 by the millimeter VLBI system Event Horizon Telescope and various pioneering results of the Space VLBI mission RadioAstron provided new momentum in high angular resolution astrophysics. In both mentioned cases, the angular resolution reached the values of about 10−20 microrcsecon… Show more

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“…The extraction of image features is limited by the diffraction limit ∼ λ D (with λ the observing frequency and D the baseline). With ground-based VLBI and a frequency of up to 345 GHz, the resolution is limited to ∼10 µas and achieving higher resolution requires spacebased VLBI, with its technological challenges (Gurvits et al 2022) and larger budget requirements as well as ecological costs. As an alternative, one can apply superresolution techniques to ground-based VLBI data.…”
Section: Outlook: Radio-vlbi At Super-resolution Scalesmentioning
confidence: 99%
“…The extraction of image features is limited by the diffraction limit ∼ λ D (with λ the observing frequency and D the baseline). With ground-based VLBI and a frequency of up to 345 GHz, the resolution is limited to ∼10 µas and achieving higher resolution requires spacebased VLBI, with its technological challenges (Gurvits et al 2022) and larger budget requirements as well as ecological costs. As an alternative, one can apply superresolution techniques to ground-based VLBI data.…”
Section: Outlook: Radio-vlbi At Super-resolution Scalesmentioning
confidence: 99%