Blazar喷流辐射区的位置研究

本项目选择blazar喷流辐射区位置这个热点问题作为研究内容，以我们首创的宽发射线与喷流辐射的回波成像法作为研究基础，利用宽发射线、喷流辐射光变曲线之间的延迟时标，来确定blazar喷流辐射区的位置。这些位置的确定将加深对活动星系核中心结构的认识，能够限制blazar伽马射线辐射机制。这种新回波成像法十分巧妙地利用了宽发射线与喷流辐射的光变曲线，来确定喷流辐射区相对于中心发动机的距离。这种方法不需要望远镜有极高的角分辨率。这种新方法推广到中心非聚束辐射与喷流聚束辐射之间的回波成像，这使得新方法有着比较好的应用前景。新方法不仅适用于低红移目标源，对高红移目标源也同样适用。新方法应用到了3C 273上，得到了比较好的结果。新回波成像法确认了宽发射线光变与喷流辐射光变主要是由中心发动机中传递而来的扰动产生的。这种研究把喷流和宽线区紧密联系在一起，这对理解活动星系核中心结构有着重要意义。

The focus issue of emitting-region in jet of blazar is chosen to be investigated in this program. On the basis of the reverberation mapping method between broad emission line and jet emission we initiated, the time lags between broad emission line light curves and jet emission light curves are used to locate the emitting-region in jet of blazar. The locating of these emitting-regions will deepen the understanding of the central structure of active galactic nuclei, and can constrain the radiation mechanism of gamma-rays in blazar. This new reverberation mapping method ingeniously makes use of broad emission line and jet emission light curves to locate the distance of emitting-region in the jet from the central engine. This method does not need telescope to have the very high angular resolution. This new method is generalized into the reverberation mapping between the central non-beaming emission and the beaming emission of jet. The generalization makes this new method to have a better potential of application. This new method is applicable to not only low redshift sources but high redshift ones. This method is applied to 3C 273, and this application has gotten a better result. This new reverberation mapping method confirms that the variations of broad emission line and jet emission are mainly produced by the disturbances transported from the central engine. This investigation closely connects the jet and the broad-line region, and this is important for the understanding of the central structure of active galactic nuclei.