论文标题
使用NGC 5506的XMM-Newton观测来测试灯柱和风回战模型
Testing The Lamp-Post and Wind Reverberation Models with XMM-Newton Observations of NGC 5506
论文作者
论文摘要
灯柱几何形状通常用于模拟积聚黑洞的X射线数据。尽管它具有简单的假设，但事实证明，它在推断诸如旋转等基本黑洞特性方面具有强大的功能。 X射线混响的早期结果表明了对如此简单的图片的支持，尽管还显示了反击模型来解释观察到的延迟。在这里，我们分析了可变Seyfert-1 Galaxy NGC 5506的新的和旧的XMM-Newton观测值，以测试这些模型。源显示的发射线特征在6.7 keV左右，相对于较硬和较软的能量带延迟了。光谱特征可以用弱相对论的磁盘线或散射在远处的材料中进行建模。通过对光谱和时序签名进行建模，我们发现解释滞后所需的反射部分比在时间平均光谱中观察到的要大，因此排除了静态的灯柱和简单的风回响模型。
The lamp-post geometry is often used to model X-ray data of accreting black holes. Despite its simple assumptions, it has proven to be powerful in inferring fundamental black hole properties such as the spin. Early results of X-ray reverberations showed support for such a simple picture, though wind-reverberation models have also been shown to explain the observed delays. Here, we analyze new and old XMM-Newton observations of the variable Seyfert-1 galaxy NGC 5506 to test these models. The source shows an emission line feature around 6.7 keV that is delayed relative to harder and softer energy bands. The spectral feature can be modeled with either a weakly relativistic disk line or by scattering in distant material. By modeling both the spectral and timing signatures, we find that the reflection fraction needed to explain the lags is larger than observed in the time-averaged spectrum, ruling out both a static lamp-post and simple wind reverberation models.
