论文标题
近红外数据的隐藏功率用于研究年轻群集的研究：RCW的说明性案例38
Hidden power of near-infrared data for the study of young clusters: Illustrative case of RCW 38
论文作者
论文摘要
恒星形成的研究在很大程度上依赖于近红外的观察结果，但是它们通常需要其他波长中的信息才能解释。我们表明，我们可以使用（基于地面的）近红外，$ j $，$ h，$ h，$ and $ k_s $宽带数据独立地独立使用（地面）近红外的年轻群集来推断距离并估算年轻恒星对象的成员资格。我们还表明，我们可以估算出$ 2.2〜μm $ m的发射量的源头的下限，其灵敏度可与中红外空间数据相当，但分辨率更好，偏见较少。最后，我们表明，从这些数据中推断质量的典型方法可能会产生基本不可靠的结果。该方法应用于年轻的，庞大的群集RCW 38，为此，我们估计的距离为1.5 kpc和$ k_s $ band的多余分数大于60 \％。
Studies of star formation rely heavily on observations in the near-infrared, but they typically need information from other wavelengths for interpretation. We show that we can infer distances and estimate the membership of young stellar objects for young clusters independently using (ground-based) near-infrared, $J$, $H,$ and $K_S$ broadband data alone. We also show that we can estimate a lower limit for the fraction of sources with $2.2~μ$m excess emission with a sensitivity comparable to that of mid-infrared space data, but with better resolution and fewer biases. Finally, we show that the typical methods for inferring masses from these data may produce substantially unreliable results. This method is applied to the young, massive cluster RCW 38, for which we estimate a distance of 1.5 kpc and a $K_S$-band excess fraction larger than 60\%.
