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We present the Stromlo Stellar Tracks, a set of stellar evolutionary tracks,computed by modifying the Modules for Experiments in Stellar Astrophysics(MESA) 1D stellar evolution package, to fit the Galactic Concordance abundancesfor hot ($T > 8000$ K) massive ($\geq 10M_\odot$) Main-Sequence (MS) stars.Until now, all stellar evolution tracks are computed at solar, scaled-solar, oralpha-element enhanced abundances, and none of these models correctly representthe Galactic Concordance abundances at different metallicities. This paper isthe first implementation of Galactic Concordance abundances to the stellarevolution models. The Stromlo tracks cover massive stars ($10\leq M/M_\odot\leq 300$) with varying rotations ($v/v_{\rm crit} = 0.0, 0.2, 0.4$) and afinely sampled grid of metallicities ($-2.0 \leq {\rm [Z/H]} \leq +0.5$;$\Delta {\rm [Z/H]} = 0.1$) evolved from the pre-main sequence to the end of$^{12}$Carbon burning. We find that the implementation of Galactic Concordanceabundances is critical for the evolution of main-sequence, massive hot stars inorder to estimate accurate stellar outputs (L, T$_{\rm eff}$, $g$), which, inturn, have a significant impact on determining the ionizing photon luminositybudgets. We additionally support prior findings of the importance that rotationplays on the evolution of massive stars and their ionizing budget. Theevolutionary tracks for our Galactic Concordance abundance scaling provide amore empirically motivated approach than simple uniform abundance scaling withmetallicity for the analysis of HII regions and have considerable implicationsin determining nebular emission lines and metallicity. Therefore, it isimportant to refine the existing stellar evolutionary models for comprehensivehigh-redshift extragalactic studies. The Stromlo tracks are publicly availableto the astronomical community online.

Stromlo Stellar Tracks: non-solar scaled abundances for massive stars