| The Effect of the Host Galaxy on the Short Timescale Variability of γ-ray Loud Blazars |
| 其他题名 | γ噪Blazar天体短时标光变的寄主星系影响
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| Dai BZ(戴本忠); Xie GZ(谢光中); Jiang ZJ(姜泽军); Li KH(李开华); Zhou SB(周曙白); Liu WW(刘威卫)
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| 发表期刊 | 云南天文台台刊
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| 2002
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| 期号 | 2页码:1-15 |
| 分类号 | P157.6
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| 产权排序 | 第1完成单位
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| 收录类别 | 其他
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| 关键词 | 活动星系核
Blazar天体
类星体
光学监测
光变
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| 摘要 | We present the optical (V and R)photometry for three GeV and/or TeV γ-ray blazars, which were observed from 2000 through 2001 , with the 1-m telescope at Yunnan Observatory. Through the observational period , the GeV γ-ray-loud source, PKS 1510-089, was very active and, it showed a significant variability of 2.0mag within 41 min in the R band. This is the most violently rapid variability in our optical monitoring program for blazars since 1982. For this source, some physical parameters, namely the emission size, Doppler factor δ, the efficiency (η)for conversionof accretedmatter into energy and luminosity are calculated. A η=59.6 was obtained, strongly implying that the relativistic beaming is responsible for the rapid variability of the γ-ray loud source. The influence of variable seeing conditions on the observations was carefully investigated. There is weak correlation between the observed variability and the local seeing conditions for the object 1ES 2344+514. The results show that the seeing fluctuations would influence the spurious variation in microvariability when the variability parameter C<5. |
| 其他摘要 | 利用云南天文台 1m光学望远镜 2 0 0 0～ 2 0 0 1年对 3个GeV和 /或TeVγ噪Blazar天体的观测 ,发现γ噪类星体PKS 1 51 0 -0 89在R波段有一个光变时标为 4 1min的星等变化为 2 .0mag的剧烈光变 ,这是迄今为止我们所观测到的变幅最大的一个γ噪Blazar天体短时标光变。对此光变 ,可估计限制光变辐射模型的一些参数 ,如辐射区半径R、多普勒因子δ以及吸积转化效率 η等。η =59.6的值强烈预示着相对论聚束效应可较好解释γ噪Blazar天体的辐射机制。我们仔细考察了大气视宁度对光变的影响。发现对 1ES 2 3 44 + 51 4,观测到的光变与当地大气视宁度有一个弱相关 ,结果表明 ,对光变参数较小 (C |
| 项目资助者 | 国家自然科学基金资助项目(19973015)
; 云南省自然科学基金资助项目(2000A004M)
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| 语种 | 英语
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| 学科领域 | 天文学
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| 文章类型 | 期刊论文
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| ISSN | 1001-7526
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| 归档日期 | 2002-10-14
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| 文献类型 | 期刊论文
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| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/7126
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| 专题 | 星系研究组
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推荐引用方式
GB/T 7714 |
Dai BZ,Xie GZ,Jiang ZJ,et al. The Effect of the Host Galaxy on the Short Timescale Variability of γ-ray Loud Blazars[J]. 云南天文台台刊,2002(2):1-15.
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| APA |
戴本忠,谢光中,姜泽军,李开华,周曙白,&刘威卫.(2002).The Effect of the Host Galaxy on the Short Timescale Variability of γ-ray Loud Blazars.云南天文台台刊(2),1-15.
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| MLA |
戴本忠,et al."The Effect of the Host Galaxy on the Short Timescale Variability of γ-ray Loud Blazars".云南天文台台刊 .2(2002):1-15.
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