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Pleiades luminosity function: fine structure and new Pre‐MS models
Author(s) -
Belikov A.N.,
Piskunov A.E.,
Schilbach E.
Publication year - 1999
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/1521-3994(199903)320:1<27::aid-asna27>3.0.co;2-5
Subject(s) - pleiades , luminosity , physics , distance modulus , luminosity function , function (biology) , astrophysics , cluster (spacecraft) , computation , mathematics , algorithm , computer science , galaxy , stars , biology , programming language , globular cluster , evolutionary biology
In order to study a model‐dependence of the results achieved in the previous investigations of the Pleiades luminosity function using D'Antona and Mazzitelli (1994) evolutionary tracks, we repeated the computations with the new track system by D'Antona and Mazzitelli (1997). The following main conclusions can be drawn: the new models agree better with observations; the helium abundance needed to fit the Hipparcos distance modulus is reduced to a more reasonable value of Y = 0.31; the cluster age becomes slightly higher and the slope of the initial mass function somewhat lower. The conclusions on the fine structure of the luminosity function do not change significantly due to the application of the new models.