活动星系核大蓝包的峰值在1050附近吗?

摘要

对中小红移不同光度AGN的大蓝包位置进行了统计检验.主要统计方法是对比软X射线波段谱指数( SX)分布与rn“直线”连接紫外1050和软X射线0.5 keV的幂指数(UV-SX)分布. 经过平均值统计和KS检验,表明二者分布是类似的. 因此，在1050至0.5 keVrn中可能是幂律谱，统计预言大蓝包峰值在1050附近.这个统计结果在软X选低光度AGN样本(WF93)上亦能得到. 这表明WF93样品尽管普遍存在软X过剩，大蓝包峰值仍可能rn在1050附近. 但是，软X射线谱指数 SX与1050到0.5 keV间“直线”连接的幂指数 UV-SX没有相关性，说明还存在一种不明的、但在远紫外(FUV)和极紫外(EUV)谱中rn起作用的因素，它既能保证 UV-SX与 SX的分布在总体上的一致性，又使二者不具备一一对等的关系.%We carried out a statistical test on the peak position of the big bluebump (BBB) of medium/small redshift AGNs of different luminosities.rnThe main method is to compare the spectral index in the soft Xray,SX and the power law index for the straight line joiningrn1050 in UV and 0.5 keV of soft Xray, UVSX. Thedistributions of these two quantities proved to be similar from theirrnmean values and by the KS test. Hence, between 1050 and0.5 keV, a power law possibly holds. The statistics predict that thernBBB peaks around 1050 . This statistical result can also beobtained in the soft Xrayselected, low luminosity AGN sample,rnWF 93. This shows that, even though a soft Xray excessgenerally exists in WF 93, the BBB may still peak around 1050 .rnHowever, there is no correlation between SX andUVSX, indicating that there is still an unknown factorrnoperating in the far and extreme ultraviolet (FUV and EUV), whichwhile ensuring overall similarity in distribution, inhibitsrnonetoone correspondence between individual values.