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The Ratio of the Numbers of Carbon Stars to M Stars in Galaxies

Published online by Cambridge University Press:  12 April 2016

Yu. L. Frantsman
Yu. L. Frantsman*
Affiliation:
Radioastrophysical Observatory, Latvian Academy of Sciences, Riga

Extract

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Simulated populations of the AGB stars were calculated with different assumptions about mass loss, initial chemical composition and dredge-up efficiency. The early-AGB (E-AGB) phase was taken into account. The numbers of carbon and oxygen stars per 106 generated stars and the ratio (NC/NM) of these numbers were obtained. It is possible to match theoretically obtained NC/NM with the observations only if the luminosity of observed stars Mbol < -3.5; otherwise it is necessary to take into account the E-AGB phase. The data in the Table are for all AGB stars in the Galaxy and for stars with Mbol < -1.80 in the LMC.

Type
1. Properties and Kinematics of the Peculiar Red Giant Stars
Information
International Astronomical Union Colloquium , Volume 106: Evolution of Peculiar Red Giant Stars , 1989 , pp. 51
Copyright
Copyright © Cambridge University Press 1989