标题： 麦哲伦云中碳和氧丰度的空间分布 显示英文标题

标题： Spatial distribution of carbon and oxygen abundances in the Magellanic Clouds

摘要： 我们展示了大型和小型麦哲伦云中碳和氧的化学丰度，这些丰度来自H II区的光学光谱。 我们分析了O/H、C/H和C/O丰度比及其在星系内的空间分布行为。 结果显示，在这两个星系中，所有这些元素的径向梯度都可以被认为是平坦的。 此外，我们将我们的结果与其他更质量更大的螺旋星系进行了比较。 我们发现星系的绝对星等M_v与其C/H和C/O梯度的斜率之间存在相关性。 质量更大的星系显示出比质量较小的星系更陡峭的C/H和C/O梯度。 显示英文摘要

摘要： We present chemical abundances of carbon and oxygen in the Large and Small Magellanic Clouds from optical spectra of H II regions. We analyse the behaviour of the O/H, C/H and C/O abundances ratios and their spatial distribution inside the galaxies. The results show that the radial gradients can be considered flat for all these elements in both galaxies. In addition, we compare our results with those of other more massive spiral galaxies. We find a correlation between the absolute magnitude, M_v, of the galaxies and the slopes of C/H and C/O gradients. The more massive galaxies show steeper C/H and C/O gradients than the less massive ones.