LBQS 0102-2713的异常光谱能量分布
The unusual spectral energy distribution of LBQS 0102-2713
摘要：
我们研究了类星体LBQS 0102-2713的SED。现有的多波长观测资料包括一个3200 - 7400 A的光谱、7个1700 - 2300 A的HST FOS谱、一个NED的GALEX NUV通量密度和K_S星等以及3个ROSAT PSPC在0.1 $-$ 2.4 keV能带的定点观测。α_ox值分别为-2.3和-2.2，与BAL类星体相当。ROSAT光子指数为6.0 ± 1.3。2500 A的光度密度比最明亮的SDSS类星体的平均值高出约10倍。我们认为，该对象可能是一类新的类星体的紫外线，X射线和N_H特性的不寻常的组合的指示。
英文摘要：
We have studied the SED of the quasar LBQS 0102-2713. The available multiwavelength data are one optical spectrum between 3200 and 7400 A, 7 HST FOS spectra between 1700 and 2300 A, one GALEX NUV flux density and a K_S magnitude obtained from NED, and 3 public ROSAT PSPC pointed observations in the 0.1$-$2.4 keV energy band. The alpha_ox values obtained are -2.3 and -2.2, respectively, comparable to BAL quasars. The ROSAT photon index is 6.0+-1.3. The 2500 A luminosity density is about a factor of 10 higher compared to the mean of the most luminous SDSS quasars. We argue that the object might be indicative for a new class of quasars with an unusual combination in their UV-, X-ray, and N_H properties.
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