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Determination of the C/M5+ Ratio in the Galactic Disk

Published online by Cambridge University Press:  12 April 2016

Francisco J. Fuenmayor
Francisco J. Fuenmayor*
Affiliation:
Departamento de Física, Facultad de Ciencias, Universidad de Los Andes, Mérida 5101, Venezuela.

Abstract

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A determination of the C/M5+ ratio, as a function of the galactocentric distance, in the galactic disk is presented. These results are based upon previous determinations of the space density for cool carbon stars and for late giant M stars in the Milky Way. Most of these results were obtained from objective-prism surveys in the near infrared using mainly Schmidt-type telescopes. The ratio C/M5+ appears to increase from 0.05 to 0.25 in the galactic disk, from the galactic center outwards. A mean value of 0.15 of this ratio for the Galaxy is suggested. Correlations between the C/M5+ ratio and currently known metal abundance gradients in the galactic disk are discussed.

Type
IX. Galactic Structure and Stellar Surveys
Information
International Astronomical Union Colloquium , Volume 148: The Future Utilisation of Schmidt Telescopes , 1995 , pp. 276 - 279
Copyright
Copyright © Astronomical Society of the Pacific 1995

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