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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

References

Alskne, Z., Alksnis, A. & Dzenyitys, V., 1977 In Properties of Carbon Stars in the Galaxy, (Academia Nauk, Riga)Google Scholar
Blanco, V.M., 1965, In Galactic Structure, Blaaw, A. & Schmidt, M., eds, (Univ.Chicago Press, Chicago).Google Scholar
Blanco, V.M., Blanco, B.M. & McCarthy, M.F., 1978, Nature, 271, 638 CrossRefGoogle Scholar
Blanco, V.M., McCarthy, M.F. & Blanco, B.M., 1980, ApJ, 242, 938 CrossRefGoogle Scholar
Blanco, V.M. & McCarthy, M., 1984, AJ, 88, 1442 CrossRefGoogle Scholar
Faúndes-Abans, & Maciéi, , 1986, Rev. Mex. Astron. Astrof., 12, 240 Google Scholar
Fuenmayor, F., 1981, Rev. Mex. Astron. Astrof., 6, 83 Google Scholar
Iben, I., 1975, ApJ, 196, 525 CrossRefGoogle Scholar
Janes, K.A., 1979, ApJS, 39, 135 CrossRefGoogle Scholar
McCarthy, M.F. 1984, In Astronomy with Schmidt-Type Telescopes, Capac-cioli, M., ed, (Reidel, Dordrecht)Google Scholar
McCuskey, S., 1969, AJ74, 807 Google Scholar
McCuskey, S. & Mehlhorn, R., 1963, AJ, 68, 319 CrossRefGoogle Scholar
Peimbert, M. & Torres-Peimbert, S., 1983, In Planetary Nebulae, Proc. IAU Symp. 103, Flower, D.R., ed, (Reidel, Dordrecht)Google Scholar
Richer, H.B. & Westerlund, B., 1983, ApJ, 264, 114 CrossRefGoogle Scholar
Sugimoto, D. & Nomoto, K., 1975, PASJ, 27, 197 Google Scholar
Stephenson, C.B., 1989, In A General Catalog of Cool Galacatic Carbon Stars, Second Edition, Publ. Warner & Swasey Obs, 3, 55 Google Scholar
Westerlund, B.E., 1971, A&AS, 4, 51 Google Scholar