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SPP 1177:  Witnesses of Cosmic History: Formation and Evolution of Black Holes, Galaxies and Their Environments

Subject Area Physics
Term from 2005 to 2011
Project identifier Deutsche Forschungsgemeinschaft (DFG) - Project number 5472175
 
In recent years our Standard Model of Cosmology was confirmed and established by numerous observations. Starting from a very dense and hot initial state, called Big Bang , the universe expanded and thereby cooled. During this expansion, large-scale structures have formed, which can be observed as galaxies and quasars today. Due to enormous improvements in the technology of modern telescopes and instruments, it is now possible to examine these cosmic objects even at extremely large distances, and therefore we are able to observe them in the universe when it was much younger than today.
The goal of this Priority Programme is a detailed study of the cosmological evolution of galaxies, the relation of different properties of a galaxy to its environment, and furthermore the origin and consequences of the black holes which seem to exist in the centre of nearly every galaxy. We want to understand why there are different morphological types of galaxies, how the relative abundance of these types depends on the density of the environment and how this mixture evolves in time. We want to examine how black holes form in the centre of a galaxy, why there is such a tight connection between the mass of a black hole and the evolution of its host galaxy, and we are interested how much the evolution of a galaxy is affected by the high-energy processes near its central black hole. In order to improve our understanding of the aforementioned aspects, we use a large variety of methods. The empirical basis is given by astronomical observations obtained by large modern telescopes which are sensitive to the entire electromagnetic spectrum, starting from radio emission up to high energetic X- and Gamma-ray emissions. Only the combination of observations at many different wavelengths leads to a complete view about the examined cosmic objects. These observations have to be done in parallel with the development of theoretical models and numerical simulations. This is essential to interpret the observations in a consistent cosmological context.
The direct support of scientific projects is only one aspect of this Priority Programme. The second main intention is to enhance the information exchange among the individual research groups. Providing a platform for collaborations between research groups of different universities and institutes leads to synergetic effects and accelerates the progress in our scientific work.
DFG Programme Priority Programmes
International Connection Austria, Denmark, Netherlands

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