标题： 13H XMM-Newton/钱德拉深场源的X射线光谱 显示英文标题

标题： X-ray spectra of sources in the 13H XMM-Newton / Chandra deep field

摘要： 我们展示了在13H XMM-Newton/钱德拉深场中发现的86个光学识别源的X射线光谱，这些源的X射线计数大于70。 样本包括50个宽发射线活动星系核（BLAGN）、25个窄发射线星系（NELG）、6个吸收线星系和5颗银河系恒星。 大多数（42/50）宽发射线活动星系核的X射线光谱与幂律形状一致。 它们的平均光子指数为Gamma = 2.0 ± 0.1，固有离散度sigma = 0.4 ± 0.1。 5个BLAGN显示出软X射线的不足，表明存在吸收现象。 显著吸收在窄发射线星系（13/25）和吸收线星系（2/6）中比在宽发射线活动星系核（5/50）中更为常见，但在这些对象的任何一类中并非普遍现象。 这20个被吸收的源中，大多数的X射线光谱与简单的冷光电吸收模型一致，但20个中有6个需要更复杂的模型，其中包括额外的软X射线发射等离子体成分或电离吸收器。 在16个未显示X射线吸收证据的星系中，只有2个可能由恒星形成提供动力，且两者的2-10 keV X射线亮度小于等于10^40 cgs。 其余14个未被吸收的NELG和星系的X射线辐射最有可能由活动星系核（AGN）驱动，但由于被明亮的宿主星系掩盖，在光学上未被探测到。 银河系恒星表现出峰值在0.5到1 keV之间的多温度热谱。 从X射线光谱来看，5颗恒星中的4颗可以与活动星系核进行区分。 显示英文摘要

摘要： We present the X-ray spectra of 86 optically-identified sources in the 13H XMM-Newton/Chandra deep field which have >70 X-ray counts. The sample consists of 50 broad line AGN, 25 narrow emission line galaxies, 6 absorption line galaxies, and 5 Galactic stars. The majority (42/50) of the broad line AGN have X-ray spectra which are consistent with a power law shape. They have a mean photon index of Gamma = 2.0 +- 0.1 and an intrinsic dispersion sigma = 0.4 +- 0.1. Five BLAGN show a deficit of soft X-rays, indicating absorption. Significant absorption is more common in the narrow emission line galaxies (13/25) and absorption line galaxies (2/6) than in the broad line AGN (5/50), but is not universal in any of these classes of object. The majority of the 20 absorbed sources have X-ray spectra consistent with a simple cold photoelectric absorber, but 6/20 require more complex models with either an additional component of soft X-ray emitting plasma, or an ionised absorber. Of the 16 galaxies which do not show evidence for X-ray absorption, only 2 objects are likely to be powered by star formation, and both have 2-10 keV X-ray luminosities of <= 10^40 cgs. The X-ray emission in the other 14 unabsorbed NELGs and galaxies is most likely powered by AGN, which are not detected in the optical because they are outshone by their luminous host galaxies. The Galactic stars show multi-temperature thermal spectra which peak between 0.5 and 1 keV. Star/AGN discrimination is possible for 4 of the 5 stars solely from their X-ray spectra.