大质量年轻星团的等效有效温度：NGC 595的情况
On the equivalent effective temperature of massive young star clusters: The case of NGC 595
摘要：
软度参数是基于年轻大质量星团电离气体发射的几条光学发射线的相对强度，可用于推导那些恒星星族无法分辨的天体的等效有效温度（T*）。该方法由于不同合成模型大气之间的不一致而具有一些不确定性，但它对研究对象之间的相对变化是鲁棒的。在巨大的HII区域NGC 595的2D光电离模型（Pérez-Gaso et al. 2011）之后，我们表明，在气体几何形状和尘埃-气体比变化较大的同一物体的不同区域中，用软度参数确定T* 也是鲁棒的。
英文摘要：
The softness parameter is based on the relative intensity of several optical emission lines emitted by the gas ionized by young massive star clusters and can be used to derive the equivalent effective temperature (T*) in those objects whose stellar population cannot be resolved. This method has several uncertainties due to the disagreement between different synthesis model atmospheres but it is robust to study the relative variations between objects. Following the 2D photoionization models of the giant HII region NGC 595 (Pérez-Montero et al. 2011) we show that the determination of T* with the softness parameter is also robust in different regions of a same object with large variations in the geometry of the gas and in the dust-to-gas ratio.
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