The Circinus Galaxy Revisited with 10 yr Fermi-LAT Data
文献类型：期刊论文
| 作者 | Guo, Xiao-Lei2,3; Xin, Yu-Liang3; Liao, Neng-Hui1,3; Fan, Yi-Zhong2,3 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2019-11-10 |
| 卷号 | 885期号:2页码:8 |
| 关键词 | galaxies: active galaxies: individual (Circinus galaxy) gamma rays: galaxies gamma rays: general radiation mechanisms: non-thermal |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ab44ba |
| 通讯作者 | Liao, Neng-Hui(nhliao@gzu.edu.cn) |
| 英文摘要 | The Circinus galaxy is a nearby composite starburst/active galactic nucleus (AGN) system. In this work we re-analyze the GeV emission from Circinus with 10 yr of Fermi-LAT Pass 8 data. In the energy range of 1?500 GeV, the spectrum can be well fitted by a power-law model with a photon index of ?;=;2.20;;0.14, and its photon flux is (5.90;;1.04);;10(?10) photons cm(?2) s(?1). Our 0.1?500 GeV flux is several times lower than that reported in previous literature, which is roughly in compliance with the empirical relation for star-forming and Local Group galaxies and might be reproduced by the interaction between cosmic rays and the interstellar medium. The ratio between the ?-ray luminosity and the total infrared luminosity is near the proton calorimetric limit, indicating that Circinus may be a proton calorimeter. However, marginal evidence for variability of the ?-ray emission is found in the timing analysis, which may indicate the activity of an AGN jet. More Fermi-LAT data and future observation of CTA are required to fully reveal the origin of its ?-ray emission. |
| WOS关键词 | GAMMA-RAY EMISSION ; LARGE-AREA TELESCOPE ; STAR-FORMATION ; RADIO-CONTINUUM ; DISCOVERY ; REGION ; GAS |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000499882600001 |
| 出版者 | IOP PUBLISHING LTD |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/35247]  |
| 专题 | 中国科学院紫金山天文台 |
| 通讯作者 | Liao, Neng-Hui |
| 作者单位 | 1.Guizhou Univ, Dept Phys & Astron, Coll Phys, Guiyang 550025, Guizhou, Peoples R China 2.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Anhui, Peoples R China 3.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210023, Jiangsu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Guo, Xiao-Lei,Xin, Yu-Liang,Liao, Neng-Hui,et al. The Circinus Galaxy Revisited with 10 yr Fermi-LAT Data[J]. ASTROPHYSICAL JOURNAL,2019,885(2):8. |
| APA | Guo, Xiao-Lei,Xin, Yu-Liang,Liao, Neng-Hui,&Fan, Yi-Zhong.(2019).The Circinus Galaxy Revisited with 10 yr Fermi-LAT Data.ASTROPHYSICAL JOURNAL,885(2),8. |
| MLA | Guo, Xiao-Lei,et al."The Circinus Galaxy Revisited with 10 yr Fermi-LAT Data".ASTROPHYSICAL JOURNAL 885.2(2019):8. |
入库方式： OAI收割
来源：紫金山天文台
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