Saio, H and Georgy, C and Meynet, G (2015) Stability boundaries for massive stars in the sHR diagram. Proceedings of the International Astronomical Union, 9 (S307). pp. 230-231. ISSN 1743-9221

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Abstract

Stability boundaries of radial pulsations in massive stars are compared with positions of variable and non-variable blue-supergiants in the spectroscopic HR (sHR) diagram (Langer & Kudritzki 2014), whose vertical axis is $4\log T_{\rm eff}-\log g \,(= \log L/M)$. Observational data indicate that variables tend to have higher $L/M$ than non-variables in agreement with the theoretical prediction. However, many variable blue-supergiants are found to have values of $L/M$ below the theoretical stability boundary; i.e., surface gravities seem to be too high by around 0.2-0.3 dex.

Item Type: Article This is the accepted author manuscript (AAM). The final published version (version of record) is available online via Cambridge University Press at http://doi.org/10.1017/S1743921314006838 - please refer to any applicable terms of use of the publisher. stars, evolution, oscillations, mass loss, Hertzsprung-Russell diagram Q Science > QB Astronomy Faculty of Natural Sciences > School of Physical and Geographical Sciences Author Symplectic 23 Apr 2015 09:58 26 May 2017 13:31 http://eprints.keele.ac.uk/id/eprint/431

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