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26th of October 2022
ATNF Colloquium
ASKAP as the Magnetic Probe of the Small Magellanic Cloud?
Yi Ki Ma (ANU)
Abstract: High spatial resolution observations of the diffuse atomic (HI) gas have led to the realisation that the HI filamentary structures in the solar neighbourhood are aligned with the ambient magnetic field. It remains unclear whether this is a general attribute of the ISM across a large Galactic volume, as well as in other galaxies with vastly different astrophysical characteristics. Using the high quality data from the Australian Square Kilometre Array Pathfinder (ASKAP) radio telescope for the Galactic ASKAP HI (GASKAP-HI) survey, I investigated whether the ~10 pc-scale HI filaments in the Small Magellanic Cloud (SMC) can act as compass needles tracing the galactic magnetic field structure. Furthermore, I mapped the preferred orientation of these filamentary HI structures to reveal the astrophysical processes shaping the ISM in the SMC. In this talk, I will present the results from this work, as well as highlighting the potential synergies between the GASKAP-HI and the POSSUM surveys.

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