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The Signatures of Galactic Disk Evolution in Vertical Colour Profiles of Edge-On Galaxies

Published online by Cambridge University Press:  25 May 2016

A. Just ,
B. Fuchs ,
R. Wielen  and
C. Scorza
A. Just
Affiliation:
Astron. Rechen-Inst., Mönchhofstr. 12-14, D-69120 Heidelberg, Germany
B. Fuchs
Affiliation:
Astron. Rechen-Inst., Mönchhofstr. 12-14, D-69120 Heidelberg, Germany
R. Wielen
Affiliation:
Astron. Rechen-Inst., Mönchhofstr. 12-14, D-69120 Heidelberg, Germany
C. Scorza
Affiliation:
Landessternwarte, Königstuhl, D-69117 Heidelberg, Germany

Extract

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Galactic disks are heated by some gravitational scattering process. The velocity dispersion and scale height increases with the age of the stellar populations as can be observed directly in the solar neighbourhood. This evolutionary effect can also be derived from the vertical structure of spiral galaxies seen edge-on. We use a physical model of a selfgravitating disk composed of isothermal subpopulations with increasing age and velocity dispersion and an exponential dust distribution (Just et al. 1995). The emissivity of the stars is computed from the luminosities in the different bands of single age populations which are computed with the method of photometric evolutionary synthesis (Einsel et al. 1995).

Type
Poster Papers
Information
Symposium - International Astronomical Union , Volume 171: New Light on Galaxy Evolution , 1996 , pp. 399
Copyright
Copyright © Kluwer 1996 

References

Einsel, C., Fritze-v. Alvensleben, U., Krüger, H., and Fricke, K.J. (1995) A&A 296, 347 Google Scholar
Just, A., Fuchs, B., and Wielen, R. (1995) submitted to A&A Google Scholar