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Evolutionary study of the Be star 28 Tau

Published online by Cambridge University Press:  12 July 2011

Nazhatulshima Ahmad ,
Mohd. Zambri Zainuddin ,
Mohd. Sahar Yahya ,
Peter P. Eggleton  and
Hakim L. Malasan
Nazhatulshima Ahmad
Affiliation:
Physics Dept., Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
Mohd. Zambri Zainuddin
Affiliation:
Physics Dept., Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
Mohd. Sahar Yahya
Affiliation:
Math. Div., Center of Fundamental Sciences, University of Malaya
Peter P. Eggleton
Affiliation:
Lawrence Livermore National Laboratory, US Livermore CA 94551 0808United State
Hakim L. Malasan
Affiliation:
Astronomy Division, FMIPA, ITB, Jl. Ganesa 10, Bandung 40132Indonesia
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Abstract

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We present an evolutionary study of 28 Tau, a Be star, in connection with its rapid rotation. The photometric data during the absence of its envelope in 1921 have been used to determine the effective temperature and luminosity of the star at the main sequence of the HR diagram. From an evolutionary model, we found that the mass and radius of the star are about 3.2 M⊙ and 3.2 R⊙ respectively. The equatorial rotation velocity of the star, νe found to be close to its critical velocity, νcr where νe/νcr ≃ 0.87.

Keywords

stars: fundamental parametersstars: evolutionstars: rotation
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S272: Active OB stars: structure, evolution, mass loss, and critical limits , July 2010 , pp. 274 - 275
Copyright
Copyright © International Astronomical Union 2011

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