标题： 低质量盘状星系的化学演化 显示英文标题

标题： Chemical evolution of low mass disc galaxies

摘要： 我们证明了多相化学演化模型能够重现螺旋序列中的相关性，包括矮星系。然而，一些不规则星系中观察到的明显的空间化学均匀性不能用该模型再现。已经开发并测试了一种进化模型来解释平坦梯度。使用包含超新星风和径向流的新代码获得的初步结果显示，径向流可能是造成这种均匀性的原因。 显示英文摘要

摘要： We show that the multiphase chemical evolution model reproduces the correlations obtained along the spiral sequence, dwarf galaxies included. However the apparent spatial chemical uniformity observed in some irregular galaxies cannot be reproduced with it. An evolutionary model has been developed and tested to explain flat gradients. Preliminary results, obtained with a new code including supernova winds and radial flows, suggest that radial flows are probably responsably for this uniformity