TY  - GEN
A1  - Jäger, Mathias
N2  - In this thesis the evolution of galaxies at redshift z < 2 was analyzed, using the COMBO-17+4 (Classifying Objects by Medium-Band Observations) survey. This survey used optical as well as near-infrared data from three different fields of view with a total area of 0.625 square degree. On the basis of an H band selected catalog the photometric
redshifts, rest-frame colors and masses of 42,134 galaxies to a limiting magnitude of H = 21.7 mag were calculated. Using the color bimodality in (U280 ?V) the galaxies were divided in a red (passive) and a blue (active) population, which were analyzed separately. The results verify the existence of a bimodality up to a redshift of z = 1.6. Further the evolution of the luminosity function for both galaxy populations was analyzed in ten redshift bins. In both populations a significant decrease in the characteristic magnitude M?B from z = 2 to z = 0.2 was measured. Moreover the number density of red galaxies showed a slight increase during this time, whereas
the number density of blue galaxies was decreasing. An analysis of the mass function showed a constant value of the characteristic mass for both populations and an
increase of the mass density for red galaxies from z = 2 to z = 0.2.
KW  - Galaxienevolution
COMBO-17+4
Photometrische Rotverschiebung
ID  - heidok14995
UR  - https://archiv.ub.uni-heidelberg.de/volltextserver/14995/
Y1  - 2013///
AV  - public
TI  - Evolution of galaxies studied by the COMBO-17+4 survey
ER  -