Optical spectral index-luminosity relation for the 17 mapped Palomar-Green quasars
文献类型：期刊论文
| 作者 | Zhang, Xue-Guang1,2
|
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2013-11-01 |
| 卷号 | 435期号:3页码:2141-2151 |
| ISSN号 | 0035-8711 |
| 关键词 | galaxies: active galaxies: nuclei quasars: emission lines |
| 通讯作者 | Mei, LJ (通讯作者) Nanchang Univ, Sch Sci, Nanchang 330031, Peoples R China. |
| 英文摘要 | In this paper, the optical spectra index-luminosity relationship is checked for the well-known 17 individually mapped quasi-stellar objects (QSOs), in order to give one more clearer conclusion on the so far conflicting dependence of the spectral index on the luminosity for an active galactic nucleus (AGN). Unlike the global relationships based on the colour difference (photometry parameters) for samples of AGNs, a more reliable relationship is determined for the multi-epoch observed individually mapped QSOs with no contamination from the host galaxies, the line variabilities and the very different central properties. The final confirmed results are as follows. (i) No strong dependence of the optical spectral index on the continuum luminosity can be found for all 17 QSOs, besides two objects (PG 0026 and PG 1613) that have some weak trends (with 3 Sigma confidence level) for the relationship. In other words, the common expectation that 'AGNs get bluer when they get brighter' is not so common. (ii) There are very different damped intrinsic variability time-scales for the variability modes of the optical spectral index and the continuum emission, through the well-applied damped random walk method for the AGN variability. In other words, there are some different intrinsic mechanisms controlling the variabilities of the optical spectral index and the power-law AGN continuum emission. Therefore, the much weaker dependence of the optical spectral index on the continuum luminosity can be further confirmed. |
| 学科主题 | Astronomy & Astrophysics |
| 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 ; BROAD-LINE REGION ; DAMPED RANDOM-WALK ; BLACK-HOLE MASSES ; FE II EMISSION ; SDSS STRIPE 82 ; RADIO SOURCES ; X-RAY ; COLOR VARIABILITY ; DARK-MATTER |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000325773000025 |
| 公开日期 | 2014-01-08 |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/9830]  |
| 专题 | 紫金山天文台_空间目标与碎片观测研究基地 |
| 作者单位 | 1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China 2.Chinese Ctr Antarctic Astron, Nanjing 210008, Jiangsu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Xue-Guang. Optical spectral index-luminosity relation for the 17 mapped Palomar-Green quasars[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2013,435(3):2141-2151. |
| APA | Zhang, Xue-Guang.(2013).Optical spectral index-luminosity relation for the 17 mapped Palomar-Green quasars.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,435(3),2141-2151. |
| MLA | Zhang, Xue-Guang."Optical spectral index-luminosity relation for the 17 mapped Palomar-Green quasars".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 435.3(2013):2141-2151. |
入库方式： OAI收割
来源：紫金山天文台
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