Photometric and spectroscopic investigations on the structure and evolution of galaxies

通过对一个低表面亮度（LSB）星系样本应用各种宽带滤光器的光度观测，将研究这些星系中恒星种群的组成。这将使我们能够限制这些星系的演化历史。其目的是在选定的领域寻找LSB星系，以比较正常星系的分布和可能的偏置。 此外，盘星系的样本，窝藏异常膨胀组件（与目前的形成模型不一致），将使用宽带和窄带成像进行研究。这里的目的是显示这些凸起在多大程度上可能是通过与其他星系的相互作用形成的。进一步的运动学信息，将获得光谱，应补充成像观察。

By applying photometric observations in various broad-band filters to a sample of Low Surface Brightness (LSB) galaxies the composition of the stellar populations in these galaxies will be investigated. This will enable us to constrain the evolutionary history of these galaxies. The aim is to search for LSB galaxies in selected fields, in order to compare the distribution and possible biasing in comparison to normal galaxies. Furthermore, a sample of disk galaxies, harboring anomalous bulge-components (inconsistent with current formation models), will be investigated using broad- and narrow-band imaging. Here the aim is to show in how far these bulges might be formed by interactions with other galaxies. Further kinematical information, to be obtained by spectroscopy, should supplement the imaging observations.