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On the isolated dwarf galaxies: from cuspy to flat dark matter density profiles and metallicity gradients

机译:在孤立的矮星系中:从暗到暗的物质密度   轮廓和金属度梯度

摘要

The chemodynamical evolution of spherical multi-component self-gravitatingmodels for isolated dwarf galaxies is studied. We compare their evolution withand without feedback effects from star formation processes. We find thatinitially cuspy dark matter profiles flatten with time as a result of starformation, without any special tuning conditions. Thus the seemingly flattenedprofiles found in many dwarfs do not contradict the cuspy profiles predicted bycosmological models. We also calculate the chemical evolution of stars and gas,to permit comparisons with observational data.
机译:研究了孤立矮星系的球形多分量自重模型的化学动力学演化。我们比较了恒星形成过程在有无反馈影响下的演化。我们发现,由于没有形成特殊的调谐条件,最初形成的阴暗暗物质轮廓随着时间的流逝而逐渐变平。因此,在许多侏儒中发现的看似扁平的轮廓并不与宇宙学模型预测的尖锐轮廓相矛盾。我们还计算了恒星和气体的化学演化,以便与观测数据进行比较。

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