paper, we define “dwarf galaxies” as galaxies with stellar mass smaller than $10^9\,{\ensuremath{\mathrm{M_\odot}}}$ or galaxies without reliable stellar mass estimation due to too low brightness. The stellar mass is estimated from the WISE [the Wide-field Infrared Survey Explorer @2010AJ....140.1868W] 3.6[$\,\mathrm{\mu m}$]{} luminosity or near-infrared H band luminosity [@2017MNRAS.472.3029W]. It is worth mentioning that this dwarf classification is generally consistent with morphological classification retrieved from the NASA/IPAC Extragalactic Database (NED). There are totally 70 dwarf galaxies in our LVHIS sample, including 9 [[$\mathrm{H}\textsc{i}$]{}]{} galaxies without identified optical counterpart. According to NED data, there are 3 galaxies (NGC 4945, NGC 5128 and the Circinus Galaxy) identified as potential active galactic nucleus (AGN) hosts. We exclude them from our analysis to minimize AGN contamination.

Continuum observations and data reduction {#sec:data_reduction}
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The 1.4 GHz (20[$\,\mathrm{cm}$]{}) radio continuum observations were taken with three configurations of the ATCA with baselines up to 6 km, including at least one compact configuration. See @2018MNRAS.tmp..467K for a description of these observations. Most galaxies were observed in two frequency bands, one narrow band for high resolution [[$\mathrm{H}\textsc{i}$]{}]{} observation and one broad band (128 MHz, divided into 32 channels) centred at either 1384 or 1376 MHz. The integration time is 