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The sulfur dimer (S$_2$) is an important molecular constituent in cometaryatmospheres and volcanic plumes on Jupiter's moon Io. It is also expected toplay an important role in the photochemistry of exoplanets. The UV spectrum ofS$_2$ contains transitions between vibronic levels above and below thedissociation limit, giving rise to a distinctive spectral signature. By usingspectroscopic information from the literature, and the spectral simulationprogram PGOPHER, a UV line list of S$_2$ is provided. This line list includesthe primary $B\,^{3}\Sigma^{-}_{u}-X\,^{3}\Sigma^{-}_{g}$ ($v'$=0-27,$v''$=0-10) electronic transition, where vibrational bands with $v'$$\geq$10are predissociated. Intensities have been calculated from existing experimentaland theoretical oscillator strengths, and semi-empirical strengths for thepredissociated bands of S$_2$ have been derived from comparisons withexperimental cross-sections. The S$_2$ line list also includes the$B''\,^{3}\Pi_{u}-X\,^{3}\Sigma^{-}_{g}$ ($v'$=0-19, $v''$=0-10) vibronic bandsdue to the strong interaction with the $B$ state. In summary, we present thenew HITRAN-formatted S$_2$ line list and its validation against existinglaboratory spectra. The extensive line list covers the spectral range21700$-$41300~cm$^{-1}$ ($\sim$242$-$461~nm) and can be used for modeling bothabsorption and emission.

A HITRAN-formatted UV line list of S$_2$ containing transitions  involving $X\,^{3}\Sigma^{-}_{g}$, $B\,^{3}\Sigma^{-}_{u}$, and  $B''\,^{3}\Pi_{u}$ electronic states