| DEPENDENCE OF THE OPTICAL/ULTRAVIOLET VARIABILITY ON THE EMISSION-LINE PROPERTIES AND EDDINGTON RATIO IN ACTIVE GALACTIC NUCLEI | |
Ai YL(艾艳丽)1,2,3 ; Yuan WM(袁为民)1,2; Zhou, HY4,5; Wang, TG4,5; Dong, XB4,5; Wang JG(王建国)1,2,3; Lu, HL4,5; Ai, YL (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Yunnan, Peoples R China.
| |
| 发表期刊 | ASTROPHYSICAL JOURNAL LETTERS
 |
| 2010-06-10 | |
| 卷号 | 716期号:1页码:L31-L35 |
| DOI | 10.1088/2041-8205/716/1/L31 |
| 产权排序 | 第1完成单位 |
| 收录类别 | SCI |
| 关键词 | Galaxies: Active Galaxies: Seyfert Quasars: General Techniques: Photometric |
| 摘要 | The dependence of the long-term optical/UV variability on the spectral and fundamental physical parameters for radio-quiet active galactic nuclei (AGNs) is investigated. The multi-epoch-repeated photometric scanning data in the Stripe-82 region of the Sloan Digital Sky Survey (SDSS) are exploited for two comparative AGN samples (mostly quasars) selected therein: a broad-line Seyfert 1 (BLS1) type sample and a narrow-line Seyfert 1 (NLS1) type AGN sample within redshifts 0.3-0.8. Their spectral parameters are derived from the SDSS spectroscopic data. It is found that on rest-frame timescales of several years the NLS1-type AGNs show systematically smaller variability compared to the BLS1-type AGNs. In fact, the variability amplitude is found to correlate, though only moderately, with the eigenvector 1 parameters, i.e., the smaller the H beta linewidth, the weaker the [O III] and the stronger the Fe II emission, the smaller the variability amplitude. Moreover, an interesting inverse correlation is found between the variability and the Eddington ratio, which is perhaps more fundamental. The previously known dependence of the variability on luminosity is not significant, and the dependence on black hole mass-as claimed in recent papers and also present in our data-fades out when controlling for the Eddington ratio in the correlation analysis, though these may be partly due to the limited ranges of luminosity and black hole mass of our samples. Our result strongly supports that an accretion disk is likely to play a major role in producing the optical/UV variability. |
| 项目资助者 | Chinese NSF [NSF-10533050] ; National Basic Research Program [2009CB824800, 2007CB815405] ; Alfred P. Sloan Foundation ; Participating Institutions ; National Science Foundation ; U.S. Department of Energy ; National Aeronautics and Space Administration ; Japanese Monbukagakusho ; Max Planck Society ; Higher Education Funding Council for England |
| 语种 | 英语 |
| 学科领域 | Astronomy & Astrophysics |
| 文章类型 | Article |
| ISSN | 2041-8205 |
| URL | 查看原文 |
| 归档日期 | 2010-05-24 |
| WOS记录号 | WOS:000278591900008 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | DIGITAL SKY SURVEY ; BLACK-HOLE MASS ; TERM OPTICAL VARIABILITY ; X-RAY VARIABILITY ; QUASAR VARIABILITY ; SEYFERT-1 GALAXIES ; RADIO-LOUD ; AGN |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/4996 |
| 专题 | 高能天体物理研究组 中国科学院天体结构与演化重点实验室 |
| 通讯作者 | Ai, YL (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Yunnan, Peoples R China. |
| 作者单位 | 1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, Yunnan, China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, Yunnan, China 3.Graduate School of the Chinese Academy of Sciences, 19A Yuquan Road, P.O. Box 3908, Beijing 100039, China 4.Center for Astrophysics, University of Science and Technology of China, Hefei, Anhui 230026, China 5.Joint Institute of Galaxies and Cosmology, SHAO, and USTC, China |
| 第一作者单位 | 中国科学院云南天文台 |
| 推荐引用方式 GB/T 7714 | Ai YL,Yuan WM,Zhou, HY,et al. DEPENDENCE OF THE OPTICAL/ULTRAVIOLET VARIABILITY ON THE EMISSION-LINE PROPERTIES AND EDDINGTON RATIO IN ACTIVE GALACTIC NUCLEI[J]. ASTROPHYSICAL JOURNAL LETTERS,2010,716(1):L31-L35. |
| APA | Ai YL.,Yuan WM.,Zhou, HY.,Wang, TG.,Dong, XB.,...&Ai, YL .(2010).DEPENDENCE OF THE OPTICAL/ULTRAVIOLET VARIABILITY ON THE EMISSION-LINE PROPERTIES AND EDDINGTON RATIO IN ACTIVE GALACTIC NUCLEI.ASTROPHYSICAL JOURNAL LETTERS,716(1),L31-L35. |
| MLA | Ai YL,et al."DEPENDENCE OF THE OPTICAL/ULTRAVIOLET VARIABILITY ON THE EMISSION-LINE PROPERTIES AND EDDINGTON RATIO IN ACTIVE GALACTIC NUCLEI".ASTROPHYSICAL JOURNAL LETTERS 716.1(2010):L31-L35. |
| 条目包含的文件 | ||||||
| 文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
| DEPENDENCE OF THE OP（330KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
修改评论