fermilatobservationsoflobedominantradiogalaxy3c207andpossibleradiationregionofrays
文献类型：期刊论文
| 作者 | Guo Shengchu2; Zhang Haiming2; Zhang Jin1 ; Liang Enwei2
|
| 刊名 | researchinastronomyandastrophysics
 |
| 出版日期 | 2018 |
| 卷号 | 018期号:006页码:70 |
| ISSN号 | 1674-4527 |
| 英文摘要 | 3 C 207 is a lobe-dominant radio galaxy with a one sided jet and bright knots, spanning a kpcMpc scale, which have been resolved in the radio, optical and X-ray bands. This target was confirmed as a γ-ray emitter with Fermi/LAT, but it is uncertain whether the γ-ray emission region is the core or knots due to the low spatial resolution of Fermi/LAT. We present an analysis of its Fermi/LAT data acquired during the past 9 years. Different from the radio and optical emission from the core, it is found that theγ-ray emission is steady without detection of flux variation at over a 2σ confidence level. This likely implies that the γ-ray emission is from its knots. We collect the radio, optical and X-ray data of knot-A,the closest knot from the core at 1.4′′, and compile its spectral energy distribution（SED）. Although the single-zone synchrotron＋SSC＋IC/CMB model that assumes knot-A is at rest can reproduce the SED in the radio-optical-X-ray band, the predicted γ-ray flux is lower than the LAT observations and the derived magnetic field strength deviates from the equipartition condition by 3 orders of magnitude. Assuming that knot-A is moving relativistically, its SED from radio to γ-ray bands would be represented well with the single-zone synchrotron＋SSC＋IC/CMB model under the equipartition condition. These results likely suggest that the γ-ray emission may be from knot-A via the IC/CMB process and the knot should have relativistical motion. The jet power derived from our model parameters is also roughly consistent with the kinetic power estimated with radio data。 |
| 语种 | 英语 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/41085]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.中国科学院国家天文台 2.广西大学 |
| 推荐引用方式 GB/T 7714 | Guo Shengchu,Zhang Haiming,Zhang Jin,et al. fermilatobservationsoflobedominantradiogalaxy3c207andpossibleradiationregionofrays[J]. researchinastronomyandastrophysics,2018,018(006):70. |
| APA | Guo Shengchu,Zhang Haiming,Zhang Jin,&Liang Enwei.(2018).fermilatobservationsoflobedominantradiogalaxy3c207andpossibleradiationregionofrays.researchinastronomyandastrophysics,018(006),70. |
| MLA | Guo Shengchu,et al."fermilatobservationsoflobedominantradiogalaxy3c207andpossibleradiationregionofrays".researchinastronomyandastrophysics 018.006(2018):70. |
入库方式： OAI收割
来源：国家天文台
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