Long-term optical spectra variability of bl lacertae object oj 287
文献类型：期刊论文
| 作者 | Zheng, Y. G.1; Zhang, X.1; Bi, X. W.2; Hao, J. M.1,3; Zhang, H. J.4,5 |
| 刊名 | Monthly notices of the royal astronomical society
 |
| 出版日期 | 2008-04-01 |
| 卷号 | 385期号:2页码:823-829 |
| ISSN号 | 0035-8711 |
| 关键词 | Galaxies : active Bl lacertae objects : general Bl lacertae objects : individual : oj 287 Galaxies : fundamental parameters |
| DOI | 10.1111/j.1365-2966.2008.12761.x |
| 通讯作者 | Zheng, y. g.() |
| 英文摘要 | Based on the long-term data in the literature, we present evidence for long-term optical spectral index variability behaviour for bl lacertae object oj 287. first we find that the optical spectral index variability period of bl lacertae object oj 287 is in agreement with the optical flux variability period of about 11.96 yr. it is considered that different processes induce optical variability, and each process should have a definite signature in the spectral index, thus leading to the periodicity of the spectral index. we also find that the time lag between the optical spectral index and the optical flux density is half of the optical flux variability period. this result tends to support the argument that when the brightness of the long-term variations increases, the optical spectra become bluer. these variations can be explained by energy loss of the electrons during the outburst. we show that the spectral index is different during the flares compared with outside the flares; between the first and second flare peaks of the superflares, the spectrum shapes are different. disparate processes possibly induce the two peaks of oj 287. |
| WOS关键词 | BLACK-HOLE MODEL ; 0.35-3.5 MICRON PHOTOMETRY ; UNEQUALLY-SPACED DATA ; OJ 287 ; LAC OBJECTS ; UBVRI PHOTOPOLARIMETRY ; NONTHERMAL SOURCES ; SLOPE VARIABILITY ; CCD PHOTOMETRY ; BLAZAR JETS |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | BLACKWELL PUBLISHING |
| WOS记录号 | WOS:000253980700018 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2384709 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Zheng, Y. G. |
| 作者单位 | 1.Yunnan Normal Univ, Dept Phys, Kunming, Yunnan, Peoples R China 2.Honghe Univ, Dept Phys, Kunming, Yunnan, Peoples R China 3.Yunnan Univ, Dept Phys, Kunming 650091, Yunnan, Peoples R China 4.Chinese Acad Sci, Natl Astron Observ, Beijing, Peoples R China 5.Chinese Acad Sci, Grad Sch, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zheng, Y. G.,Zhang, X.,Bi, X. W.,et al. Long-term optical spectra variability of bl lacertae object oj 287[J]. Monthly notices of the royal astronomical society,2008,385(2):823-829. |
| APA | Zheng, Y. G.,Zhang, X.,Bi, X. W.,Hao, J. M.,&Zhang, H. J..(2008).Long-term optical spectra variability of bl lacertae object oj 287.Monthly notices of the royal astronomical society,385(2),823-829. |
| MLA | Zheng, Y. G.,et al."Long-term optical spectra variability of bl lacertae object oj 287".Monthly notices of the royal astronomical society 385.2(2008):823-829. |
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来源：中国科学院大学
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