| Examining the High-energy Radiation Mechanisms of Knots and Hotspots in Active Galactic Nucleus Jets | |
Zhang, J; Du, SS; Guo, SC; Zhang, HM; Chen, L ; Liang, EW; Zhang, SN; Zhang SN(张双南)
| |
| 2018 | |
| Source Publication | ASTROPHYSICAL JOURNAL
 |
| ISSN | 0004-637X |
| EISSN | 1538-4357 |
| Volume | 858Issue:1Pages:27 |
| Subtype | Article |
| Abstract | 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. |
| Keyword | galaxies: active galaxies: jets radiation mechanisms: non-thermal X-rays: galaxies |
| DOI | 10.3847/1538-4357/aab9b2 |
| WOS Keyword | X-RAY-EMISSION ; HUBBLE-SPACE-TELESCOPE ; II RADIO-SOURCES ; HOT-SPOTS ; PARTICLE-ACCELERATION ; CHANDRA DETECTION ; DEEP CHANDRA ; M87 JET ; GALAXY ; BLAZARS |
| Indexed By | SCI |
| Language | 英语 |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:000431142400006 |
| ADS Bibcode | 2018ApJ...858...27Z |
| AXRIV CODE | 1803 |
| inspireid | 1664011 |
| Citation statistics |
Cited Times:6 [ADS]
|
| Document Type | 期刊论文 |
| Identifier | http://ir.ihep.ac.cn/handle/311005/285880 |
| Collection | 粒子天体物理中心 理论物理室 |
| Affiliation | 中国科学院高能物理研究所 |
| First Author Affilication | Institute of High Energy |
| Recommended Citation GB/T 7714 | Zhang, J,Du, SS,Guo, SC,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, J.,Du, SS.,Guo, SC.,Zhang, HM.,Chen, L.,...&张双南.(2018).Examining the High-energy Radiation Mechanisms of Knots and Hotspots in Active Galactic Nucleus Jets.ASTROPHYSICAL JOURNAL,858(1),27. |
| MLA | Zhang, J,et al."Examining the High-energy Radiation Mechanisms of Knots and Hotspots in Active Galactic Nucleus Jets".ASTROPHYSICAL JOURNAL 858.1(2018):27. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| 20180396.pdf（2340KB） | 期刊论文 | 出版稿 | 限制开放 | CC BY-NC-SA | Application Full Text | |
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment