Low-Frequency VLBI Network Using SKA-LOW
arXiv:2607.15039
The paper proposes a low‑frequency (100–350 MHz) VLBI network that incorporates the Square Kilometre Array Low (SKA‑LOW) together with other high‑sensitivity radio telescopes in the Asia‑Pacific region, aiming to boost sensitivity by up to two orders of magnitude and enable precise astrometric and high‑fidelity imaging studies.
Abstract
We propose the development of a low-frequency Very Long Baseline Interferometry (VLBI) network operating in the 100-350 MHz range, incorporating the Square Kilometre Array Low (SKA-LOW). SKA-LOW is expected to achieve exceptionally high sensitivity within this frequency band. By integrating SKA-LOW with other high-sensitivity radio telescopes located across the Asia-Pacific region, the proposed network is anticipated to deliver up to two orders of magnitude improvement in sensitivity compared to the existing VLBA. While several scientific themes utilizing low-frequency VLBI have already been proposed, we specifically advocate for astrometric studies employing existing VLBI stations to demonstrate the feasibility and scientific potential of this frequency regime. Furthermore, the combination of SKA-LOW with additional radio telescopes will enable high-fidelity imaging observations, significantly enhancing the quality and scope of low-frequency VLBI science.
Published in Advancing Astrophysics with the SKA II (AASKAII), 2026 (arXiv:2606.20366). Report-no:AASKAII/Kobayashi01