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Pulsations of blue supergiants before and after helium core ignition

Published online by Cambridge University Press:  18 February 2014

Jakub Ostrowski  and
Jadwiga Daszyńska-Daszkiewicz
Jakub Ostrowski
Affiliation:
Instytut Astronomiczny, Uniwersytet Wrocławski, ul. Kopernika 11, 51-622 Wrocław, Poland email: [email protected]
Jadwiga Daszyńska-Daszkiewicz
Affiliation:
Instytut Astronomiczny, Uniwersytet Wrocławski, ul. Kopernika 11, 51-622 Wrocław, Poland email: [email protected]
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Abstract

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We present results of pulsation analyses of B-type supergiant models with masses of 14 – 18 M⊙, considering evolutionary stages before and after helium core ignition. Using a non-adiabatic pulsation code, we compute instability domains for low-degree modes. For selected models in these two evolutionary phases, we compare properties of pulsation modes. Significant differences are found in oscillation spectra and the kinetic energy density of pulsation modes.

Keywords

stars: early-typestars: supergiantsstars: oscillationsstars: evolution
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S301: Precision Asteroseismology , August 2013 , pp. 321 - 324
Copyright
Copyright © International Astronomical Union 2014 

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