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We present MeerKAT HI line observations of the nearby interacting galaxy pairNGC 1512/1510. The MeerKAT data yield high-fidelity image sets characterised byan excellent combination of high angular resolution (~20") and and sensitivity(~0.08 Msun/pc^2), thereby offering the most detailed view of this well-studiedsystem's neutral atomic hydrogen content, especially the HI co-located with theoptical components of the galaxies. The stellar bulge and bar of NGC 1512 arelocated within a central HI depression where surface densities fall below 1Msun/pc^2, while the galaxy's starburst ring coincides with a well-defined HIannulus delimited by a surface density of 3 Msun/pc^2. In stark contrast, thestar-bursting companion, NGC 1510, has its young stellar population preciselymatched to the highest HI over-densities we measure (~12.5 Msun/pc^2). Theimproved quality of the MeerKAT data warrants the first detailed measurementsof the lengths and masses of the system's tidally-induced HI arms. We measurethe longest of the two prominent HI arms to extend over ~27 kpc and to containmore than 30% of the system's total HI mass. We quantitatively explore thespatial correlation between HI and far-ultraviolet flux over a large range ofHI mass surface densities spanning the outer disk. The results indicate thesystem's HI content to play an important role in setting the pre-conditionsrequired for wide-spread, high-mass star formation. This work serves as ademonstration of the remarkable efficiency and accuracy with which MeerKAT canimage nearby systems in HI line emission.

MeerKAT HI line observations of the nearby interacting galaxy pair NGC 1512/1510