  Astrophysical molecular spectroscopy is an important means of searching for
new physics through probing the variation of the proton-to-electron mass ratio,
$\mu$. New molecular probes could provide tighter constraints on the variation
of $\mu$ and better direction for theories of new physics. Here we summarise
our previous paper \citep{19SyMoCu.CN} for astronomers, highlighting the
importance of accurate estimates of peak molecular abundance and temperature as
well as spectral resolution and sensitivity of telescopes in different regions
of the electromagnetic spectrum. Whilst none of the 11 astrophysical diatomic
molecules we investigated showed enhanced sensitive rovibronic transitions at
observable intensities for astrophysical environments, we have gained a better
understanding of the factors that contribute to high sensitivities. From our
results, CN, CP, SiN and SiC have shown the most promise of all astrophysical
diatomic molecules for further investigation, with further work currently being
done on CN.
