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Seen and Unseen Matter in the Galactic Disc

Published online by Cambridge University Press:  04 August 2017

Annie Robin ,
Olivier Bienaymé  and
Michel Crézé
Annie Robin
Affiliation:
Observatoire de Besançon, 41 bis avenue de l'observatoire, F-25044 Besançon Cedex, France
Olivier Bienaymé
Affiliation:
Observatoire de Besançon, 41 bis avenue de l'observatoire, F-25044 Besançon Cedex, France
Michel Crézé
Affiliation:
Observatoire de Besançon, 41 bis avenue de l'observatoire, F-25044 Besançon Cedex, France

Abstract

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We use a Galaxy model including three components for the ‘seen’ stellar matter (Robin, Crézé, 1985). A scenario of star formation and evolution in the disc constrains the age distribution within each spectral type and luminosity range. The model fits available star counts. We add the ‘seen’ interstellar matter with local density 0.04 M⊙ pc−3 and scale height 140 pc. Thus the total observed local density is 0.085 M⊙ pc−3.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 117: Dark Matter in the Universe , 1987 , pp. 36
Copyright
Copyright © Reidel 1987 

References

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Robin, A., Crézé, M., 1985, Astron. Astrophys. in press.Google Scholar