标题： 新的{\it 查德拉}个结果关于 Seyfert I 星系：Fe-K 线 显示英文标题

标题： New {\it Chandra} Results on Seyfert I galaxies: Fe-K lines

摘要： 我们使用钱德拉高能透射光栅光谱仪（HETGS）数据对九个 Seyfert I 星系的 Fe-K 线进行了测量。中心能量分布较窄（6.403 +/- 0.062 keV），表明线核心起源于冷物质。如果{\it 全部}这些线是相对论性展宽的盘线的峰值，这将需要不现实的精细调节。然而，至少其中三个活动星系核明显显示出具有底层展宽成分的复杂 Fe-K 线，可能是来自盘的。在其他星系中，一个看似狭窄的 Fe-K 线（即使它被钱德拉分辨出来）仍可能是盘线的峰值。要区分这种情形与来自遥远物质的起源需要变化信息。 显示英文摘要

摘要： We present measurements of the Fe-K line for nine Seyfert I galaxies using Chandra High Energy Transmission Grating Spectrometer (HETGS) data. The centroid energies are narrowly dispersed (6.403 +/- 0.062 keV) and indicate an origin of the line cores in cold matter. If {\it all} the lines in this sample were the peaks of a relativistically broadened disk line, it would require unrealistically fine tuning. However, at least three of the nine AGN clearly show a complex Fe-K line with an underlying broad component, possibly from a disk. In the others, an apparently narrow Fe-K line (even if it is resolved by Chandra) may still be due to the peak of a disk line. To distinguish this scenario from an origin in distant matter requires variability information.