Universal Stochastic Process in Blazar Gamma-Ray Variability Revealed by Bayesian Kernel Comparison
文献类型：期刊论文
| 作者 | Liu, Jiachao3; Ding, Nan3; Gu, Qiusheng2; Peng, Keli3; Tang, Yunyong3; Chen, Yongyun4; Xiong DR(熊定荣)1 |
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2026-03-01 |
| 卷号 | 999期号:1 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ae3d97 |
| 产权排序 | 第4完成单位 |
| 文献子类 | Article |
| 英文摘要 | Although Gaussian processes have been widely applied in modeling the high-energy light curves of blazars, a systematic comparison of the performances of different kernel functions within Gaussian processes has remained lacking. Based on a Bayesian inference framework, we systematically compare the performances of three Gaussian process kernel functions in modeling blazars' long-term gamma-ray light curves. The results indicate that, among the tested kernel functions, the Mat & eacute;rn 1/2 kernel performs best for both types of blazars-BL Lacertae objects (BL Lacs) and flat-spectrum radio quasars (FSRQs)-suggesting that a universal stochastic process likely governs the high-energy variability of the blazar population. Statistically, this kernel is equivalent to the shot-noise model, supporting the scenario that the gamma-ray variability in blazars originates from the random superposition of numerous independent flares. A statistical analysis of hyperparameters reveals that the variability amplitude of FSRQs is significantly higher than that of BL Lacs, which may be related to their radiation being more strongly modulated by external photon fields. The intrinsic correlation timescales of both sources are similar and show no dependence on black hole mass or intrinsic luminosity. This indicates that the timescale is primarily determined by local physical conditions within the jet, rather than by the global properties of the central engine. |
| 学科主题 | 天文学 ; 天体物理学 ; 高能天体物理学 ; 星系与宇宙学 |
| URL标识 | 查看原文 |
| 出版地 | No.2 The Distillery, Glassfields, Avon Street, Bristol, ENGLAND |
| WOS关键词 | ACTIVE GALACTIC NUCLEI ; OPTICAL VARIABILITY ; RELATIVISTIC JETS ; SPECTRUM ; MICROVARIABILITY ; TIMESCALE ; EMISSION ; BEHAVIOR ; COMPTON ; PATTERN |
| 资助项目 | the National Natural Science Foundation of China[12563003] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001699604600001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | the National Natural Science Foundation of China[12563003] |
| 版本 | 出版稿 |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/28993]  |
| 专题 | 云南天文台_丽江天文观测站（南方基地） |
| 通讯作者 | Ding, Nan |
| 作者单位 | 1.Yunnan Observatories, Chinese Academy of Sciences, 396 Yangfangwang, Guandu District, Kunming 650216, People’s Republic of China 2.School of Astronomy and Space Science, Nanjing University, Nanjing, Jiangsu 210093, People’s Republic of China; 3.School of Physical Science and Technology, Kunming University, Kunming 650214, People’s Republic of China; orient.dn@foxmail.com, tangyunyong888@163.com; 4.College of Physics and Electronic Engineering, Qujing Normal University, Qujing 655011, People’s Republic of China; |
| 推荐引用方式 GB/T 7714 | Liu, Jiachao,Ding, Nan,Gu, Qiusheng,et al. Universal Stochastic Process in Blazar Gamma-Ray Variability Revealed by Bayesian Kernel Comparison[J]. ASTROPHYSICAL JOURNAL,2026,999(1). |
| APA | Liu, Jiachao.,Ding, Nan.,Gu, Qiusheng.,Peng, Keli.,Tang, Yunyong.,...&熊定荣.(2026).Universal Stochastic Process in Blazar Gamma-Ray Variability Revealed by Bayesian Kernel Comparison.ASTROPHYSICAL JOURNAL,999(1). |
| MLA | Liu, Jiachao,et al."Universal Stochastic Process in Blazar Gamma-Ray Variability Revealed by Bayesian Kernel Comparison".ASTROPHYSICAL JOURNAL 999.1(2026). |
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来源：云南天文台
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