  Traditionally, the far ultraviolet (FUV) to far-infrared (FIR) and radio
spectral energy distributions (SEDs) of galaxies have been considered
separately despite the common physical process shaping them. In this work, we
explore the utility of simultaneously fitting FUV-radio SEDs using an extended
version of the ProSpect SED fitting code considering contributions from both
free-free and synchrotron emission. We use a small sample of galaxies from the
Deep Extragalactic VIsible Legacy Survey (DEVILS) and the Key Insights on
Nearby Galaxies: a Far-Infrared Survey with Herschel (KINGFISH) where
high-quality and robust FUV-radio data are available to provide an ideal sample
for testing a radio extension of ProSpect. As the parameterisation of the radio
extension links the radio continuum to the FIR emission, we explore the benefit
of using radio continuum measurements as a constraint on the energy balance
between dust attenuation and emission. We find that for situations where
MIR-FIR photometry is unavailable, including a 1.4 GHz continuum measurement
allows for improved accuracy in recovered star formation rates and dust
luminosities of galaxies reducing the median uncertainty by 0.1 and 0.2 dex
respectively. We also demonstrate that incorporating 3 and 10 GHz measurements
allows for further constraint on the energy balance and therefore the star
formation rate and dust luminosity. This demonstrates the advantage of
extending FUV-FIR SED fitting techniques to radio frequencies, especially as we
move into an era where FIR surveys will remain limited and radio data become
abundant (i.e. with the SKA and precursors).
