THE JET-DRIVEN OUTFLOW IN THE RADIO GALAXY SDSS J1517+3353: IMPLICATIONS FOR DOUBLE-PEAKED NARROW-LINE ACTIVE GALACTIC NUCLEUS
THE JET-DRIVEN OUTFLOW IN THE RADIO GALAXY SDSS J1517+3353: IMPLICATIONS FOR DOUBLE-PEAKED NARROW-LINE ACTIVE GALACTIC NUCLEUS
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DOI：
10.1088/0004-637x/716/1/131
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发表时间：
2010-04
期刊：
影响因子：
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通讯作者：
D. Rosario;G. Shields;G. Taylor;G. Taylor;S. Salviander;K. Smith
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作者：
D. Rosario;G. Shields;G. Taylor;G. Taylor;S. Salviander;K. Smith
我们报告了一项有趣的活动星系的研究，该星系被选为早期型宿主SDSS J151709.20+335324.7 （z = 0.135）的潜在多重超大质量黑洞合并，这是对SDSS光谱准恒星对象（QSO）数据库中双峰[O iii]线的完整搜索。基于地面的SDSS成像显示，在宿主星系光度中心的两侧有两个蓝色结构，彼此相隔约5.7 kpc。通过SDSS光纤和Keck/HIRES长缝光谱的结合，可以证明，除了这两个特征之外，还有第三个独特的结构围绕着宿主星系的核心。这三种结构都表现出高度电离的谱线发射，谱线比具有塞弗特II型活动星系核的特征。从HIRES光谱中对空间分辨发射在线剖面的分析揭示了三个不同的运动子分量，一个是静止的，另外两个相对于宿主星系的系统速度以- 350 km s - 1和500 km s - 1移动。对成像和光谱数据的比较证实了运动分量和空间结点之间的强烈关联，这意味着该物体中存在高度扰动和复杂的活动区域。对该系统中结的宽带位置、颜色、运动学和光谱特性的比较分析导致了两种合理的解释：(1)由于大规模干合并而产生的多个活动星系核（AGN），或者(2)非常强大的射电喷流驱动的流出。随后的VLA射电成像显示了一个清晰的喷流与发射线上气体对齐，证实了后一种解释。我们使用宽带无线电测量来检查喷流对宿主星系星际介质的影响，并发现无线电瓣中的能量可以将很大一部分气体加热到虚拟温度。最后，我们讨论了可能有助于未来调查区分射流驱动的运动学和真正的黑洞双星的测试。J1517+3353是AGN反馈的卓越实验室，值得深入的后续研究。在附录中，我们展示了第二个AGN的高分辨率射电成像，具有双峰[O iii]线，SDSS J112939.78+605742.6，显示了亚弧秒射电射流。如果在无线电大声agn中窄线的双峰性质通常是由于射电喷流的相互作用，我们建议在大多数这样的系统中应该预期扩展的无线电结构。
We report on the study of an intriguing active galaxy that was selected as a potential multiple supermassive black hole merger in the early-type host SDSS J151709.20+335324.7 (z = 0.135) from a complete search for double-peaked [O iii] lines from the SDSS spectroscopic quasi-stellar object (QSO) database. Ground-based SDSS imaging reveals two blue structures on either side of the photometric center of the host galaxy, separated from each other by about 5.7 kpc. From a combination of SDSS fiber and Keck/HIRES long-slit spectroscopy, it is demonstrated that, in addition to these two features, a third distinct structure surrounds the nucleus of the host galaxy. All three structures exhibit highly ionized line emission with line ratios characteristic of Seyfert II active galactic nuclei. The analysis of spatially resolved emission-line profiles from the HIRES spectrum reveal three distinct kinematic subcomponents, one at rest and the other two moving at −350 km s−1 and 500 km s−1 with respect to the systemic velocity of the host galaxy. A comparison of imaging and spectral data confirm a strong association between the kinematic components and the spatial knots, which implies a highly disturbed and complex active region in this object. A comparative analysis of the broadband positions, colors, kinematics, and spectral properties of the knots in this system lead to two plausible explanations: (1) a multiple active galactic nucleus (AGN) produced due to a massive dry merger, or (2) a very powerful radio jet-driven outflow. Subsequent VLA radio imaging reveals a clear jet aligned with the emission-line gas, confirming the latter explanation. We use the broadband radio measurements to examine the impact of the jet on the interstellar medium of the host galaxy, and find that the energy in the radio lobes can heat a significant fraction of the gas to the virial temperature. Finally, we discuss tests that may help future surveys distinguish between jet-driven kinematics and true black-hole binaries. J1517+3353 is a remarkable laboratory for AGN feedback and warrants deeper follow-up study. In the Appendix, we present high-resolution radio imaging of a second AGN with double-peaked [O iii] lines, SDSS J112939.78+605742.6, which shows a sub-arcsecond radio jet. If the double-peaked nature of the narrow lines in radio-loud AGNs are generally due to radio jet interactions, we suggest that extended radio structure should be expected in most of such systems.