| Mark 421天体多波段辐射机制研究 |
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| 引用本文： | 康世举,黄邦蓉,康婷,梁继华,郑永刚.Mark 421天体多波段辐射机制研究[J].天文学报,2011,52(5):357-364. |
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| 作者姓名： | 康世举 黄邦蓉 康婷 梁继华 郑永刚 |
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| 作者单位： | 云南师范大学物理与电子信息学院昆明650092 |
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| 基金项目： | 云南省自然科学基金项目(2009ZC056M)资助 |
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| 摘 要： | 基于对数抛物线型电子分布,用单区、均匀同步自康普顿(Synchrotron Self-Compton,SSC)辐射模型计算BL Lac天体S5 0716+714的多波段能谱,并与Paggi等人的结果进行了比较.模型的计算结果与Paggi等人直接用δ函数近似得到的结果不同,导致该差异的主要原因可能是由于单电子同步辐射的δ函数近似丢失了电子的部分能量而影响逆康普顿散射结果.把该模型分别应用于Mark 421天体的高、中、低3种不同状态下的多波段观测结果,理论计算结果能与不同状态下的观测结果符合得很好.分析认为,观测到的Mark 421天体的不同状态可能是由于喷流内电子分布变化引起的.
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| 关 键 词： | 星系:核 BL Lac天体:个别:Mark 421 辐射机制:非热 |
A Research on Multi-band Radiation Mechanism of Mark 421 |
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| KANG Shi-ju,HUANG Bang-rong,KANG Ting,LIANG Ji-hua,ZHENG Yong-gang.A Research on Multi-band Radiation Mechanism of Mark 421[J].Acta Astronomica Sinica,2011,52(5):357-364. |
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| Authors: | KANG Shi-ju HUANG Bang-rong KANG Ting LIANG Ji-hua ZHENG Yong-gang |
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| Institution: | KANG Shi-ju HUANG Bang-rong KANG Ting LIANG Ji-hua ZHENG Yong-gang (School of Physics & Electronic Information Technology,Yunnan Normal University,Kunming 650092) |
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| Abstract: | Based on the logarithmic parabolic energy distribution of electrons and the homogeneous one-zone synchrotron self-Compton model,the multi-band spectral energy distribution of S5 0716+714 is reproduced.Compared with Paggi’s results which are obtained with the method of theδfunction approximation,we find our results are a little different.It is argued in this paper that theδfunction approximation used in calculating the synchrotron radiation of a single electron leads electrons to partly lose their energies,thus affects the results of inverse Compton scattering radiation.The model is applied to the high,middle and low states of Mark 421 object,respectively.By changing the parameters,we find that the multi-band spectral energy distributions of Mark 421 can be well reproduced.It is considered that the variation of the distribution of the electrons in the jet probably induces the different observational states. |
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| Keywords: | galaxies nuclei BL Lacertae objects individual Mark 421 radiation mechanisms non-thermal |
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