Hostname: page-component-7479d7b7d-wxhwt Total loading time: 0 Render date: 2024-07-11T05:20:23.933Z Has data issue: false hasContentIssue false
  • English
  • Français

Analysis of strange-mode instability with time-dependent convection in hot massive stars

Published online by Cambridge University Press:  18 February 2014

Takafumi Sonoi  and
Hiromoto Shibahashi
Takafumi Sonoi
Affiliation:
Department of Astronomy, University of Tokyo, Tokyo, 113-0033, Japan email: sonoi@astron.s.u-tokyo.ac.jp, shibahashi@astron.s.u-tokyo.ac.jp
Hiromoto Shibahashi
Affiliation:
Department of Astronomy, University of Tokyo, Tokyo, 113-0033, Japan email: sonoi@astron.s.u-tokyo.ac.jp, shibahashi@astron.s.u-tokyo.ac.jp
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

We carry out nonadiabatic analysis of strange-modes in hot massive stars with time-dependent convection (TDC) for the first time. Although convective luminosity in envelopes of hot massive stars is not as dominative as in stars near the red edge of the classical Cepheid instability strip in the Hertzsprung-Russell (H-R) diagram, we have found that the strange-mode instability can be affected by the treatment of convection. However, existence of the instability around and over the Humphreys-Davidson (H-D) limit is independent of the treatment. This implies that the strange-mode instability could be responsible for the lack of observed stars over the H-D limit regardless of uncertainties on convection theories.

Keywords

stars: Hertzsprung-Russell diagramstars: oscillations (including pulsations)
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S301: Precision Asteroseismology , August 2013 , pp. 493 - 494
Copyright
Copyright © International Astronomical Union 2014 

References

Aerts, C., Lefever, K., Baglin, A., et al. 2010, A&A, 513, L11Google Scholar
Gabriel, M. 1996, Bull. of the Astron. Soc. of India, 24, 233Google Scholar
Gabriel, M., Scuflaire, R., Noels, A., & Boury, A. 1974, Bull. Acad. Royale de Belgique, 60, 866Google Scholar
Glatzel, W. & Mehren, S. 1996, MNRAS, 282, 1470CrossRefGoogle Scholar
Godart, M., Dupret, M.-A., Noels, A., et al. 2011, in: Neiner, C., Wade, G., Meynet, G., & Peters, G. (eds.), Active OB stars: structure, evolution, mass loss, and critical limits, Proc. IAU Symposium No. 272 (San Francisco: ASP), p. 503Google Scholar
Grigahcène, A., Dupret, M.-A., Gabriel, M., Garrido, R., & Scuflaire, R. 2005, A&A, 434, 1055Google Scholar
Grott, M., Chernigovski, S., & Glatzel, W. 2005, MNRAS, 360, 1532Google Scholar
Humphreys, R. M. & Davidson, K. 1979, ApJ, 232, 409CrossRefGoogle Scholar
Paxton, B., Bildsten, L., Dotter, A., Herwig, F., Lesaffre, P., & Timmes, F. 2011, ApJS, 192, 3CrossRefGoogle Scholar
Saio, H., Georgy, C., & Meynet, G. 2013, MNRAS, 433, 1246Google Scholar
Shibahashi, H. & Osaki, Y. 1981, PASJ, 33, 427Google Scholar
Sonoi, T. & Shibahashi, H. 2012, PASJ, 64, 2Google Scholar
Unno, W. 1967, PASJ, 19, 140Google Scholar
Wood, P. R. 1976, MNRAS, 174, 531CrossRefGoogle Scholar