Calibration of the Alpha Centauri system - Metallicity and age - Observatoire de Paris Access content directly
Journal Articles Astronomy and Astrophysics - A&A Year : 1991

Calibration of the Alpha Centauri system - Metallicity and age

Abstract

The binary system Alpha Cen A and B, with its well known parallax, its high quality orbit and the reasonable hypothesis of a common origin and age for both components, is a useful test of stellar evolution models. Evolutionary sequences are computed for 1.085 and 0.9 solar masses with different values of Z, Y and alpha (= l/Hp). Adopting luminosities and effective temperatures as derived from the observations, Z = 0.04, Y = 0.32, alpha = 1.6 and t = 5 Gyr. The Z-value derived from evolutionary sequences is very sensitive to the difference in effective temperature between the two components.
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obspm-03771057 , version 1 (07-09-2022)

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A. Noels, N. Grevesse, P. Magain, C. Neuforge, A. Baglin, et al.. Calibration of the Alpha Centauri system - Metallicity and age. Astronomy and Astrophysics - A&A, 1991. ⟨obspm-03771057⟩

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