论文标题
探索紫外线变化与无线电定价中的无线电排放之间的连接：无线电排放起源的线索
Exploring the Connection between UV/Optical Variations and Radio Emission in Radio-Quiet Quasars: Clues on Radio Emission Origin
论文作者
论文摘要
无线电定价类星体（RQQ）的无线电发射一直是一个漫长的谜团，其物理起源仍然不清楚。在先前的工作中，我们发现紫外线/光学可变的类星体具有更强的X射线发射，表明圆盘湍流与X射线电晕加热之间有联系。在这项工作中，我们首次研究了从SDSS Stripe 82和第一个无线电调查中选择的RQQ中的UV/光学变异性与无线电发射之间的关系。我们中位数堆叠了第一个图像，并在单独无线电源的共同添加图像中检测RQQ的明显信号。控制其他参数的效果，包括红移，黑洞质量，横载量光度和爱丁顿的比率，我们发现更多可变的RQQ（已知X射线相对较明亮，都显示出较弱的无线电发射，与线性X射线/无线电相关，如果无线电的发射来自或驱动了cormona cormona cornaive。该发现还表明，如果RQQ中的无线电发射是由AGN活性驱动的（例如较弱的射流），那么底层驾驶过程与驱动紫外线/光学变异性的圆盘湍流无关。或者，无线电发射可能是由于宿主星系中的恒星形成所致。
The radio emission in radio-quiet quasars (RQQs) has been a long mystery and its physical origin remains unclear. In a previous work we find UV/optical more variable quasars have stronger X-ray emission, indicating a link between disc turbulence and X-ray corona heating. In this work, for the first time, we investigate the relation between UV/optical variability and the radio emission in RQQs selected from SDSS stripe 82 and FIRST radio survey. We median stack the FIRST images and detect clear signals from RQQs in the co-added images of individually radio non-detected sources. Controlling the effects of other parameters, including redshift, black hole mass, bolometric luminosity and Eddington ratio, we find more variable RQQs, which are known to be X-ray relatively brighter, show tentatively weaker radio emission, contrary to the linear X-ray/radio correlation if the radio emission is from or driven by the corona. The discovery also suggests that if the radio emission in RQQs is driven by AGN activity (such as weak jet), the underlying driving process is independent to the disc turbulence which drives UV/optical variability and probably also corona heating. Alternatively, the radio emission could be due to star formation in the host galaxies.
