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Evolution of Galaxy Luminosity in the CDM Model

Published online by Cambridge University Press:  25 May 2016

Mirta Mosconi ,
Patricia Tissera  and
Diego Garcia Lambas
Mirta Mosconi
Affiliation:
Observatorio Astronómico de Córdoba, Argentina
Patricia Tissera
Affiliation:
Observatorio Astronómico de Córdoba, Argentina Consejo de Investigaciones Científicas y Técnicas (CONICET)
Diego Garcia Lambas
Affiliation:
Observatorio Astronómico de Córdoba, Argentina Consejo de Investigaciones Científicas y Técnicas (CONICET)

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we analyze the evolution of the luminosity function of galaxies using the CDM model in numerical simulations. There is an observational excess in the number counts of galaxies per square degree in the blur band Nb (i.e. APM, Maddox et al. 1990). Several authors have tried to reproduce it trying to fit the observations. Our model assumes an instantaneous star formation rate (SFR) proportional to a power of the local density. A ‘single star burst’ is produced each time step and we follow the evolution of the luminosity and colour of each ‘stellar group’. The galaxies are identified with a density criterium. We compute U,V,B,K colours and Nb and our results agree quite well with observations.

Type
Part II: Contributed Papers
Information
Symposium - International Astronomical Union , Volume 168: Examining the Big Bang and the Diffuse Background Radiations , 1996 , pp. 503 - 504
Copyright
Copyright © Kluwer 1996 

References

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