KMS National Astronomical Observatories, CAS
| Leptonic or Hadronic Emission: The X-Ray Radiation Mechanism of Large-scale Jet Knots in 3C 273 | |
| Wang, Zhen-Jie1; Zhang, Jin2; Sun, Xiao-Na3; Liang, En-Wei1 | |
| 2020-04-01 | |
| Source Publication | ASTROPHYSICAL JOURNAL
 |
| ISSN | 0004-637X |
| Volume | 893Issue:1Pages:11 |
| Abstract | A comprehensively theoretical analysis of the broadband spectral energy distributions (SEDs) of large-scale jet knots in 3C 273 is presented to reveal their X-ray radiation mechanism. We show that these SEDs cannot be explained with a single-electron population model when the Doppler boosting effect is either considered or not. By adding a more energetic electron (the leptonic model) or proton (the hadronic model) population, the SEDs of all knots are well represented. In the leptonic model, the electron population that contributes the X-ray emission is more energetic than the one responsible for the radio-optical emission by almost two orders of magnitude; the derived equipartition magnetic field strengths (B-eq) are similar to 0.1 mG. In the hadronic model, protons with energy similar to 20 PeV are required to interpret the observed X-rays; the B-eq values are several mG, larger than those in the leptonic model. Based on the fact that no resolved substructures are observed in these knots and the fast cooling time of the high-energy electrons does not easily explain the observed X-ray morphologies, we argue that the two distinct electron populations accelerated in these knots are unreasonable and their X-ray emission is attributed to the proton synchrotron radiation accelerated in these knots. In cases where these knots have relativistic motion toward the observer, the super-Eddington issue of the hadronic model can be avoided. Multiwavelength polarimetry and gamma-ray observations with high resolution may be helpful to discriminate these models. |
| Keyword | Galaxy jets Active galactic nuclei Non-thermal radiation sources X-ray active galactic nuclei |
| Funding Organization | National Natural Science Foundation of China ; National Natural Science Foundation of China ; Guangxi Natural Science Foundation ; Guangxi Natural Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Guangxi Natural Science Foundation ; Guangxi Natural Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Guangxi Natural Science Foundation ; Guangxi Natural Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Guangxi Natural Science Foundation ; Guangxi Natural Science Foundation |
| DOI | 10.3847/1538-4357/ab7d35 |
| WOS Keyword | ACTIVE GALACTIC NUCLEI ; HOT-SPOTS ; SYNCHROTRON-RADIATION ; ENERGY-DISTRIBUTION ; DOPPLER FACTORS ; RADIO ; CHANDRA ; ACCELERATION ; GALAXIES ; CAVITIES |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[11973050] ; National Natural Science Foundation of China[11573034] ; National Natural Science Foundation of China[11533003] ; National Natural Science Foundation of China[11851304] ; National Natural Science Foundation of China[U1731239] ; Guangxi Natural Science Foundation[2017AD22006] ; Guangxi Natural Science Foundation[2018GXNSFGA281007] |
| Funding Organization | National Natural Science Foundation of China ; National Natural Science Foundation of China ; Guangxi Natural Science Foundation ; Guangxi Natural Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Guangxi Natural Science Foundation ; Guangxi Natural Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Guangxi Natural Science Foundation ; Guangxi Natural Science Foundation ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Guangxi Natural Science Foundation ; Guangxi Natural Science Foundation |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:000528741600001 |
| Publisher | IOP PUBLISHING LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.bao.ac.cn/handle/114a11/55081 |
| Collection | 中国科学院国家天文台 |
| Corresponding Author | Zhang, Jin |
| Affiliation | 1.Guangxi Univ, Sch Phys Sci & Technol, Guangxi Key Lab Relativist Astrophys, Nanning 530004, Peoples R China 2.Chinese Acad Sci, Natl Astron Observ, Key Lab Space Astron & Technol, Beijing 100012, Peoples R China 3.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Peoples R China |
| Recommended Citation GB/T 7714 | Wang, Zhen-Jie,Zhang, Jin,Sun, Xiao-Na,et al. Leptonic or Hadronic Emission: The X-Ray Radiation Mechanism of Large-scale Jet Knots in 3C 273[J]. ASTROPHYSICAL JOURNAL,2020,893(1):11. |
| APA | Wang, Zhen-Jie,Zhang, Jin,Sun, Xiao-Na,&Liang, En-Wei.(2020).Leptonic or Hadronic Emission: The X-Ray Radiation Mechanism of Large-scale Jet Knots in 3C 273.ASTROPHYSICAL JOURNAL,893(1),11. |
| MLA | Wang, Zhen-Jie,et al."Leptonic or Hadronic Emission: The X-Ray Radiation Mechanism of Large-scale Jet Knots in 3C 273".ASTROPHYSICAL JOURNAL 893.1(2020):11. |
| Files in This Item: | There are no files associated with this item. | |||||
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment