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Massive star evolution revealed in the Mass-Luminosity plane.
- Source :
- Proceedings of the International Astronomical Union; Aug2018, Issue S346, p480-485, 6p
- Publication Year :
- 2018
-
Abstract
- 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 (α <subscript> ov </subscript>=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 α <subscript> ov </subscript>=0.5 (rather than α <subscript> ov </subscript>=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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 17439213
- Issue :
- S346
- Database :
- Complementary Index
- Journal :
- Proceedings of the International Astronomical Union
- Publication Type :
- Academic Journal
- Accession number :
- 140938040
- Full Text :
- https://doi.org/10.1017/S1743921319001170