Massive star evolution revealed in the Mass-Luminosity plane

Erin R. Higgins, Jorick S. Vink

Research output: Contribution to journalArticlepeer-review


Massive star evolution is dominated by key physical processes such as mass loss, convection and rotation, yet these effects are poorly constrained, even on the main sequence. We utilise a detached, eclipsing binary HD166734 as a testbed for single star evolution to calibrate new MESA stellar evolution grids. We introduce a novel method of comparing theoretical models with observations in the 'Mass-Luminosity Plane', as an equivalent to the HRD (see Higgins & Vink 2018). We reproduce stellar parameters and abundances of HD166734 with enhanced overshooting (αov=0.5), mass loss and rotational mixing. When comparing the constraints of our testbed to the systematic grid of models we find that a higher value of αov=0.5 (rather than αov=0.1) results in a solution which is more likely to evolve to a neutron star than a black hole, due to a lower value of the compactness parameter.

Original languageEnglish
Pages (from-to)480-485
Number of pages6
JournalProceedings of the International Astronomical Union
Publication statusPublished - 30 Dec 2019
Externally publishedYes


  • convection
  • stars: evolution
  • stars: mass loss
  • stars: rotation

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Astronomy and Astrophysics
  • Nutrition and Dietetics
  • Public Health, Environmental and Occupational Health
  • Space and Planetary Science


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