IHEP OpenIR  > 粒子天体物理中心
Blob ejection from advection-dominated accretion flow. II. The multiwavelength properties of light curves
Wang JM(王建民); Wang, JM; Kusunose, M
2002
发表期刊ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
卷号138期号:2页码:#REF!
通讯作者Wang, JM (reprint author), Chinese Acad Sci, Inst High Energy Phys, High Energy Astrophys Lab, Beijing 10039, Peoples R China.
摘要It has been argued that blobs ejected from advection-dominated accretion flow through the accretion-ejection instability undergo expansion because of their high internal energy density. The expanding blobs interact with their surroundings and form a strong shock, which accelerates a group of electrons to be relativistic. Then flares are formed. This model has advances in two aspects: shock acceleration and self-consistent injection. We derive an analytical formula of the injection function of relativistic electrons based on Sedov's law. We calculate the time-dependent spectrum of relativistic electrons in such an expanding blob. The light-travel effect, the evolution of the electron spectrum due to energy loss, and the escape of relativistic electrons from the radiating region are considered, as well as the expansion (at subrelativistic speed) of the coasting blob. A large number of light curves spanning a wide range of parameters have been given in this paper. Regarding the symmetry, relative amplitude, duration of a flare, and the time lag between peak fluxes, we find four basic kinds of light curves for the nonexpanding blob and seven basic kinds of light curves for the expanding blob. The expansion weakens the magnetic field as well as enlarging the size of the blob. The predicted light curves thus show very complicated properties that are composed of the basic light curves, because the physical conditions are changing in the expanding blob. For the rapid decays of magnetic field (for example, B proportional to r(-n)), we find that the falling profile is a power law of time as nuF(nu) proportional to t((1-alpha)n/5), where alpha is the power-law index of injected electrons. This decline is controlled by the decay of magnetic field rather than the energy losses of relativistic electrons. We also calculate the evolution of the photon spectrum from both nonexpanding and expanding blobs, Different shapes in the phase of decreasing luminosity are then obtained for different parameter values. The photon index alpha(ph) stays constant for nonexpanding blobs when luminosity decreases, whereas alpha(ph) continues to decrease after the luminosity reaches its maximum for expanding blobs. It is expected that we can extract the information on ejected blobs from the observed light curves based on the present model.
文章类型Article
关键词BL Lacertae objects : general quasars : general radiation mechanisms : nonthermal
学科领域Astronomy & Astrophysics
DOI10.1086/324192
收录类别SCI
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000173959700001
引用统计
被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/227188
专题粒子天体物理中心
推荐引用方式
GB/T 7714
Wang JM,Wang, JM,Kusunose, M. Blob ejection from advection-dominated accretion flow. II. The multiwavelength properties of light curves[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2002,138(2):#REF!.
APA 王建民,Wang, JM,&Kusunose, M.(2002).Blob ejection from advection-dominated accretion flow. II. The multiwavelength properties of light curves.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,138(2),#REF!.
MLA 王建民,et al."Blob ejection from advection-dominated accretion flow. II. The multiwavelength properties of light curves".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES 138.2(2002):#REF!.
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
2591.pdf(390KB)期刊论文作者接受稿开放获取CC BY-NC-SA浏览 请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[王建民]的文章
[Wang, JM]的文章
[Kusunose, M]的文章
百度学术
百度学术中相似的文章
[王建民]的文章
[Wang, JM]的文章
[Kusunose, M]的文章
必应学术
必应学术中相似的文章
[王建民]的文章
[Wang, JM]的文章
[Kusunose, M]的文章
相关权益政策
暂无数据
收藏/分享
文件名: 2591.pdf
格式: Adobe PDF
所有评论 (0)
暂无评论
 

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。