类星体SDSS J0924 +0219中的吸积盘
The accretion disc in the quasar SDSS J0924+0219
摘要：
我们目前的单历元多波长光学近红外观测的“异常”透镜类星体SDSS J0924 + 0219，使用麦哲伦6.5米巴德望远镜在拉斯坎帕纳斯天文台，智利。这些数据清楚地解决了透镜系统中的异常亮像对，并且随着波长的减小，异常通量比呈现出强烈的减小。这被解释为透镜类星体核心中尺寸减小的源的微透镜效应的结果。我们将连续发射区的半径sigma建模为波长的幂律sigma lambda ^zeta。我们将u '带发射区域的高斯半径上限设置为3.04E16 h70 ^{-1/2}（/M_sun）^{1/2} cm，并将尺寸-波长幂律指数约束为zeta <1.34，置信度为95%。<M>这些观测结果排除了SDSS J0924 + 0219中吸积盘的α盘处方，置信度为94%。
英文摘要：
We present single-epoch multi-wavelength optical-NIR observations of the "anomalous" lensed quasar SDSS J0924+0219, made using the Magellan 6.5-metre Baade telescope at Las Campanas Observatory, Chile. The data clearly resolve the anomalous bright image pair in the lensed system, and exhibit a strong decrease in the anomalous flux ratio with decreasing wavelength. This is interpreted as a result of microlensing of a source of decreasing size in the core of the lensed quasar. We model the radius of the continuum emission region, sigma, as a power-law in wavelength, sigma lambda^zeta. We place an upper limit on the Gaussian radius of the u'-band emission region of 3.04E16 h70^{-1/2} (<M>/M_sun)^{1/2} cm, and constrain the size-wavelength power-law index to zeta<1.34 at 95% confidence. These observations rule out an alpha-disc prescription for the accretion disc in SDSS J0924+0219 with 94% confidence.
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