论文标题
Seyfert 1 Galaxy Kug 1141+371 I中的觉醒野兽
The Awakening Beast in the Seyfert 1 Galaxy KUG 1141+371 I
论文作者
论文摘要
Kug 1141+371是一个seyfert 1星系，在过去十年中，光学和紫外线带的同时增加了。例如，2019年最新的迅速观察表明，自2009年以来，库格1141+371中AGN的UVW2通量增加了一个数量级。与此同时，Kug 1141+371的柔软X射线通量也显示出自2007年以来的稳定增加，这一数量的稳定增加了一个大量的次数。限制为3.2％，假设黑洞质量为$ 10^{8} m _ {\ odot} $。在这项工作中，我们进行了详细的多上述X射线光谱分析，重点是X射线连续发射的变异性和令人困惑的软过量发射。此外，我们的SED模型还表明，圆盘温度同时升高，内部圆盘半径降低，同时增加了积聚率。最后，我们讨论了Kug 1141+371与爆发中黑洞瞬变之间的可能联系。
KUG 1141+371 is a Seyfert 1 galaxy that shows a simultaneous flux increase in the optical and UV bands in the past decade. For instance, the latest Swift observation in 2019 shows that the UVW2 flux of the AGN in KUG 1141+371 has increased by over one order of magnitude since 2009. Meanwhile, the soft X-ray flux of KUG 1141+371 also shows a steady increase by one order of magnitude since 2007. The significant multi-wavelength luminosity change is likely due to a boost of mass accretion rate from approximately 0.6% of the Eddington limit to 3.2%, assuming a black hole mass of $10^{8}M_{\odot}$. In this work, we conduct detailed multi-epoch X-ray spectral analysis focusing on the variability of the X-ray continuum emission and the puzzling soft excess emission. In addition, our SED models also suggest a simultaneous increase of disc temperature and a decreasing inner disc radius along with the increasing accretion rate. Finally, we discuss possible connection between KUG 1141+371 and black hole transients in outburst.
