CURVATURE OF THE SPECTRAL ENERGY DISTRIBUTIONS OF BLAZARS
文献类型：期刊论文
| 作者 | Chen, Liang1,2
|
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2014-06-20 |
| 卷号 | 788期号:2页码:179(16pp) |
| 关键词 | BL Lacertae objects: general galaxies: active galaxies: jets radiation mechanisms: non-thermal |
| 通讯作者 | 陈亮 |
| 英文摘要 | In this paper, spectral energy distributions (SED) of both synchrotron and inverse Compton (IC) components of a sample of Fermi bright blazars are fitted by a log-parabolic law. The second-degree term of the log parabolameasures the curvature of an SED. We find a statistically significant correlation between the synchrotron peak frequency and its curvature. This result is in agreement with the theoretical prediction and confirms previous studies that dealt with a single source with observations at various epochs or a small sample. If a broken power law is employed to fit the SED, the difference between the two spectral indices (i.e., |a2-a1|) can be considered a "surrogate" of the SED curvature. We collect data from the literature and find a correlation between the synchrotron peak frequency and the spectral difference. We do not find a significant correlation between the IC peak frequency and its curvature, which may be caused by a complicated seed photon field. It is also found that the synchrotron curvatures are on average larger than those of IC curvatures, and there is no correlation between these two parameters. As suggested by previous works, both the log-parabolic law of the SED and the above correlation can be explained by statistical and/or stochastic particle accelerations. Based on a comparison of the slops of the correlation, our result seems to favor stochastic acceleration mechanisms and emission processes. Additional evidence, including SED modeling, particle acceleration simulation, and comparisons between some predictions and empirical relations/correlations, also seems to support the idea that the electron energy distribution (and/or synchrotron SED) may be log-parabolic. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | ACTIVE GALACTIC NUCLEI ; LARGE-AREA TELESCOPE ; BL-LAC OBJECTS ; LOG-PARABOLIC SPECTRA ; GAMMA-RAY EMISSION ; TEVBL LACERTAE OBJECTS ; FERMI BRIGHT BLAZARS ; PARTICLE-ACCELERATION ; RADIO QUASARS ; MULTIFREQUENCY OBSERVATIONS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000337466200082 |
| 公开日期 | 2015-02-14 |
| 源URL | [http://119.78.226.72//handle/331011/15722]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China 2.Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing 210093, Jiangsu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Liang. CURVATURE OF THE SPECTRAL ENERGY DISTRIBUTIONS OF BLAZARS[J]. ASTROPHYSICAL JOURNAL,2014,788(2):179(16pp). |
| APA | Chen, Liang.(2014).CURVATURE OF THE SPECTRAL ENERGY DISTRIBUTIONS OF BLAZARS.ASTROPHYSICAL JOURNAL,788(2),179(16pp). |
| MLA | Chen, Liang."CURVATURE OF THE SPECTRAL ENERGY DISTRIBUTIONS OF BLAZARS".ASTROPHYSICAL JOURNAL 788.2(2014):179(16pp). |
入库方式： OAI收割
来源：上海天文台
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