Combined Effects of Rotation and Age Spreads on Extended Main-Sequence Turn Offs - Isochrones and Stellar Tracks

Theoretical isochrones and EEP stellar tracks featured in Gossage et al. 2019 (Combined Effects of Rotation and Age Spreads on Extended Main-Sequence Turn Offs). These 1D stellar evolution models are based on MESA r7503, and utilize the same physical assumptions as in MIST v1.0 (Choi et al. 2016).

The models are described in Gossage et al. 2018 and Gossage et al. 2019**, but salient features include:

• Metallicities [Fe/H] = -0.45, -0.30, -0.15, 0.0, 0.15, 0.30, 0.45 (assuming Asplund et al. 2009 protosolar abundances \(\rm Z_{\odot}\) = 0.0142).
• Rotation rates from v/v_crit = 0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9 (initiated at ZAMS)
• Masses from 0.1 to 8 solar masses with spacings of: 
  • \(\rm \Delta M = 0.05 M_{\odot}\) for \(\rm M < 1 M_{\odot}\)
  • \(\rm \Delta M = 0.04 M_{\odot}\) for \(\rm 1 M_{\odot} \leq M < 2 M_{\odot}\)
  • \(\rm \Delta M = 0.2 M_{\odot}\) for \(\rm 2 M_{\odot} \leq M \leq 8 M_{\odot}\)
• Models are evolved up to the first thermal pulse.

File name convention: zip files, e.g., \(\texttt{MIST_v1.0_feh_p0.15_rotating_tracks.zip}\), contain models at a particular metallcity ([Fe/H] = 0.15 in this case), at all rotation rates and masses. The file \(\texttt{MIST_v1.0_feh_m0.15_rotating_tracks.zip}\) contains models at [Fe/H] = -0.15, and so on. \(\texttt{*_tracks.zip}\) contain EEP stellar track files and \(\texttt{*_isochrones.zip}\) files contain isochrone files, both in the same format as EEP track and theoretical isochrones found on the MIST website.

Notes:

*These tracks and isochrones may be converted into observable tracks and isochrones (w/ gravity darkening effects if desired) via Aaron Dotter's iso code.

**These are the same models as featured in Gossage et al. 2018, but in that work, [Fe/H] = -0.60 and -0.75 were featured as well and only included models up to v/v_crit = 0.6. We include these models from Gossage et al. 2018 here as well. Models at [Fe/H] = -0.60 have been extended to v/v_crit = 0.9, while [Fe/H] = -0.75 only includes up to the original v/v_crit = 0.6.