Reference : Calibration of the Alpha Centauri system - Metallicity and age
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/41067
Calibration of the Alpha Centauri system - Metallicity and age
English
Noels-Grötsch, Arlette mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO) >]
Grevesse, Nicolas mailto [> > Département d'astrophys., géophysique et océanographie (AGO) >]
Magain, Pierre mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image >]
Neuforge, Corinne [ > > ]
Baglin, A. [Meudon, Observatoire, France]
Lebreton, Y. [Meudon, Observatoire, France]
1-Jul-1991
Astronomy and Astrophysics
EDP Sciences
247
91-94
Yes (verified by ORBi)
International
0004-6361
1432-0746
Les Ulis
France
[en] METALLICITY ; SOLAR NEIGHBORHOOD ; STELLAR EVOLUTION ; ABUNDANCE ; BINARY STARS ; HERTZSPRUNG-RUSSELL DIAGRAM ; MILKY WAY GALAXY
[en] 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.
http://hdl.handle.net/2268/41067
http://adsabs.harvard.edu/abs/1991A%26A...247...91N
The authors thank EDP Sciences for their deposit authorization.

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