Q2237 +0305中能量相关X射线微透镜的发现
Discovery of Energy Dependent X-ray Microlensing in Q2237+0305
摘要：
本文给出了引力透镜类星体Q2237+0305的Chandra X射线长期观测数据，观测周期为10年，共20个历元。我们可以很容易地检测到微透镜变化之间的图像在全（0.2- 8 keV），软（0.2- 2 keV），和硬（2- 8 keV）带在非常高的信心。我们还首次探测到软、硬X射线波段之间的彩色微透镜差异。硬X射线带的微透镜比软带更强，这表明被认为产生X射线的吸积盘上方的日冕具有不均匀的电子分布，其中更热、更高能的电子占据了黑洞周围更紧凑的区域。硬和软X射线带都比光学（restframe UV）发射更强地微透镜化，表明X射线发射比光学更紧凑，证实了来自其他透镜的微透镜化结果。
英文摘要：
We present our long term Chandra X-ray monitoring data for the gravitationally lensed quasar Q2237+0305 with 20 epochs spanning 10 years. We easily detect microlensing variability between the images in the full (0.2--8 keV), soft (0.2--2 keV), and hard (2--8 keV) bands at very high confidence. We also detect, for the first time, chromatic microlensing differences between the soft and hard X-ray bands. The hard X-ray band is more strongly microlensed than the soft band, suggesting that the corona above the accretion disk thought to generate the X-rays has a non-uniform electron distribution, in which the hotter and more energetic electrons occupy more compact regions surrounding the black holes. Both the hard and soft X-ray bands are more strongly microlensed than the optical (restframe UV) emission, indicating that the X-ray emission is more compact than the optical, confirming the microlensing results from other lenses.
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