Dark Halos of Galaxies

如果星系中存在非发光(暗)物质，则可以更容易地解释观测数据。通过将理论模型与观测结果进行比较，可以研究暗物质的影响。这项研究是为了研究暗物质的效应，研究计划分为四个基本主题：-NGC5666的观测研究-一个带有气体盘的椭圆星系，为研究椭圆星系的质量分布提供了一个独特的机会。-观测矮小星系的自转曲线。-对星系的暗晕进行建模的广泛视角。将显示对现有数据进行仔细拟合的结果。这些技术将被用来适应新的观测材料。将显示在详细模型中包括“抽芯”的必要性。虽然这些现象已经被一些研究人员笼统地描述过，但它们还没有被纳入到模型构建中。-模拟原星系的膨胀和重新塌陷的演化。将这些项目联系在一起的共同主题是，它们都旨在确定暗物质的形式和分布。为了将这些量与星系形成时以及更早的时候暗物质的性质联系起来，需要进行模拟。最后，这项研究将给出关于星系晕的结果：它们是冷的、热的还是热的？属性的一致性是由于先天还是后天的原因？

There are observational data that can be explained more easily if there is non-luminous (dark) matter in galaxies. The effects of the dark matter can be studied by comparing the theoretical models with observations. This research is to study the effects of dark matter and the research plan is divided into four basic topics: - An observational study of NGC5666 - an elliptical galaxy with a disk of gas that provides a unique opportunity for the study of the mass distribution of an elliptical galaxy. - Observations of the rotation curves of dwarf galaxies. - A broad look at modeling dark halos of galaxies. The results of careful fitting of existing data will be shown. These techniques will be used to fit the new observational material. The need to include "core pulling" in detailed models will be shown. While these phenomena have been generically described by a number of investigators, they have not yet been incorporated in model building. - Simulations of the evolution of the expansion and recollapse of a protogalaxy. The common theme that unites these projects is that they are all aimed at determining the form and distribution of dark matter. The simulations are needed to relate these quantities to the properties of dark matter at the time of galaxy formation and at still earlier times. Finally the research will give results about galaxy halos: Are they cold, warm or hot? Are uniformities in properties due to nature or nurture?