Implications of Bulk Velocity Structures in AGN Jets
Implications of Bulk Velocity Structures in AGN Jets
复制标题
AGN 射流中体积速度结构的影响
DOI：
10.1093/pasj/61.5.1153
复制
发表时间：
2009-07
影响因子：
2.3
通讯作者：
Gao, Xiaoyan
中科院分区：
文献类型：
--
作者：
Dai, Benzhong;Wang, Jiancheng;Yang, Jianping;Gao, Xiaoyan
建立了具有连续纵向和横向整体速度结构的AGN射流的同步自康普顿(SSC)模型和外康普顿(EC)模型。观测到的光谱在不同的速度结构和视角下显示出复杂而有趣的图案。用这些模型计算了两个典型的BLLac天体(BLO)(MERK421和0716+714)和(1)平谱射电类星体(FSRQs)(3C279)的同步加速器和逆康普顿谱，并讨论了BLO和FR I射电星系(FRI)统一的喷流体积速度结构的含义。通过计算具有连续整体速度结构的BLLac目标射流的同步加速器谱和SSC谱，我们发现在增加视角的情况下，这些谱与具有均匀速度结构的射流的谱有很大的不同。BLO和FRI的统一不太受视角的限制，而会受到喷流本身固有的速度结构的影响。通过考虑具有视速度约束的整体速度结构的射流，我们讨论了不同视角下压印在观测光谱上的速度结构。我们发现，由于体积元素被压缩或展开，谱受纵向速度结构的影响很大。最后，我们给出了FSRQs和FRII射电星系(FRII)的EC谱，发现与同步加速器和SSC谱相比，它们受速度结构的影响较小。
Synchrotron self-Compton (SSC) models and External Compton (EC) models of AGN jets with continually longitudinal and transverse bulk velocity structures have been constructed. The observed spectra show complex and interesting patterns in different velocity structures and viewing angles. These models were used to calculate the synchrotron and inverse Compton spectra of two typical BL Lac objects (BLO) (Mrk 421 and 0716+714) and (one) Flat Spectrum Radio Quasars (FSRQs) (3C 279), and to discuss the implications of jet bulk velocity structures in a unification of the BLO and FR I radio galaxies (FRI). By calculating the synchrotron spectra and SSC spectra of BL Lac object jets with continually bulk velocity structures, we have found that the spectra are much different from those in jets with a uniform velocity structure under increasing viewing angles. The unification of BLO and FRI is less constrained by the viewing angles, and would be imprinted by velocity structures intrinsic to the jets, themselves. By considering jets with bulk velocity structures constrained by the apparent speed, we discuss the velocity structures imprinted on the observed spectra for different viewing angles. We find that the spectra are greatly impacted by longitudinal velocity structures, because the volume elements are compressed or expanded. Finally, we present the EC spectra of FSRQs and FR II radio galaxies (FRII), and find that they are weakly affected by the velocity structures compared to synchrotron and SSC spectra.
登录
查看更多内容
DOI：
10.1086/498714
发表时间：
2005-10
期刊：
The Astrophysical Journal Letters
影响因子：
--
作者：
M. Georganopoulos;E. Perlman;D. Kazanas
通讯作者：
M. Georganopoulos;E. Perlman;D. Kazanas
DOI：
10.1086/533521
发表时间：
2008-01
期刊：
The Astrophysical Journal
影响因子：
--
作者：
B. Piner;Niraj Pant;Philip G. Edwards
通讯作者：
B. Piner;Niraj Pant;Philip G. Edwards
DOI：
10.1086/425354
发表时间：
2004-12
期刊：
The Astrophysical Journal
影响因子：
--
作者：
Jian-cheng Wang;Huiquan Li;L. Xue
通讯作者：
Jian-cheng Wang;Huiquan Li;L. Xue
DOI：
10.1086/379769
发表时间：
2003-09
期刊：
The Astrophysical Journal
影响因子：
--
作者：
B. Piner;Philip G. Edwards
通讯作者：
B. Piner;Philip G. Edwards
DOI：
--
发表时间：
2003
期刊：
--
影响因子：
--
作者：
通讯作者：
--