Examining the High-energy Radiation Mechanisms of Knots and Hotspots in Active Galactic Nucleus Jets
文献类型：期刊论文
| 作者 | Zhang, SN ; Liang, EW; Zhang SN(张双南); Zhang, J; Du, SS; Guo, SC; Zhang, HM; Chen, L
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| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2018 |
| 卷号 | 858期号:1页码:27 |
| ISSN号 | 0004-637X |
| 关键词 | galaxies: active galaxies: jets radiation mechanisms: non-thermal X-rays: galaxies |
| DOI | 10.3847/1538-4357/aab9b2 |
| 文献子类 | Article |
| 英文摘要 | We compile the radio-optical-X-ray spectral energy distributions (SEDs) of 65 knots and 29 hotspots in 41 active galactic nucleus jets to examine their high-energy radiation mechanisms. Their SEDs can be fitted with the single-zone leptonic models, except for the hotspot of Pictor A and six knots of 3C 273. The X-ray emission of 1 hotspot and 22 knots is well explained as synchrotron radiation under the equipartition condition; they usually have lower X-ray and radio luminosities than the others, which may be due to a lower beaming factor. An inverse Compton (IC) process is involved for explaining the X-ray emission of the other SEDs. Without considering the equipartition condition, their X-ray emission can be attributed to the synchrotron-self-Compton process, but the derived jet powers (P-jet) are not correlated with L-k and most of them are larger than L-k, with more than three orders of magnitude, where L-k is the jet kinetic power estimated with their radio emission. Under the equipartition condition, the X-ray emission is well interpreted with the IC process for the cosmic microwave background photons (IC/CMB). In this scenario, the derived P-jet of knots and hotspots are correlated with and comparable to L-k. These results suggest that the IC/CMB model may be a promising interpretation of the X-ray emission. In addition, a tentative knot-hotspot sequence in the synchrotron peak-energy-peak-luminosity plane is observed, similar to the blazar sequence, which may be attributed to the different cooling mechanisms of electrons. |
| 电子版国际标准刊号 | 1538-4357 |
| WOS关键词 | X-RAY-EMISSION ; HUBBLE-SPACE-TELESCOPE ; II RADIO-SOURCES ; HOT-SPOTS ; PARTICLE-ACCELERATION ; CHANDRA DETECTION ; DEEP CHANDRA ; M87 JET ; GALAXY ; BLAZARS |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000431142400006 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/285880]  |
| 专题 | 高能物理研究所_粒子天体物理中心 高能物理研究所_理论物理室 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Zhang, SN,Liang, EW,Zhang SN,et al. Examining the High-energy Radiation Mechanisms of Knots and Hotspots in Active Galactic Nucleus Jets[J]. ASTROPHYSICAL JOURNAL,2018,858(1):27. |
| APA | Zhang, SN.,Liang, EW.,张双南.,Zhang, J.,Du, SS.,...&Chen, L.(2018).Examining the High-energy Radiation Mechanisms of Knots and Hotspots in Active Galactic Nucleus Jets.ASTROPHYSICAL JOURNAL,858(1),27. |
| MLA | Zhang, SN,et al."Examining the High-energy Radiation Mechanisms of Knots and Hotspots in Active Galactic Nucleus Jets".ASTROPHYSICAL JOURNAL 858.1(2018):27. |
入库方式： OAI收割
来源：高能物理研究所
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