Spectral Index and Core-Dominance Parameter in Blazars

Spectral Index and Core-Dominance Parameter in Blazars
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耀变体中的光谱指数和核心优势参数

DOI:
10.1093/pasj/62.2.211
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发表时间:
2010-04
影响因子:
2.3
通讯作者:
Liu, Yi
Liu, Yi
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Tao, Jun;Fan, Jun-Hui;Huang, Yong;Yang, Jiang-He;Liu, Yi

文献摘要

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本文讨论了Blazar(BL Lacertae天体和平谱射电类星体)的谱指数与核心优势参数之间的关系。为了做到这一点,我们使用密歇根大学射电天文台(UMRAO)的初步数据计算了38个BL Lacertae天体的光谱指数,这些数据来自我们以前的论文(2008年)。PASJ,60,707)。对于核心优势参数,我们主要根据Kovalev等人(2005)给出的通量密度计算。AJ,130,2473)。我们已经编制了一份清单的核心优势参数的一些来源,从现有的文献。在这个意义上,我们获得了119个耀变体的样本(38个BL Lacertae对象和81个平坦频谱射电类星体)。从相关数据中,我们发现光谱指数与核心优势参数相关,并试图用相对论聚束模型解释这种关联。此外,我们还比较了BL蝎虎座天体与平谱射电类星体的性质。我们的结论是,光谱指数和核心优势参数之间的关联可能是由于相对论性的聚束效应。
In this paper, we discuss the relationship between the spectral index and the core-dominance parameter for blazars (BL Lacertae objects and flat spectrum radio quasars). To do so, we calculated the spectral indexes for 38 BL Lacertae objects using the preliminary data of the University of Michigan Radio Astronomy Observatory (UMRAO) with those for flat spectrum radio quasars from our previous paper (2008. PASJ, 60, 707). For the core-dominance parameters, we mainly calculated them from the flux densities given by Kovalev et al. (2005. AJ, 130, 2473). We have compiled a list of core-dominance parameters for some sources from the available literature. In this sense, we obtained a sample of 119 blazars (38 BL Lacertae objects and 81 flat spectrum radio quasars). From the relevant data, we found that the spectral index is associated with the core-dominance parameter, and tried to explain this association using a relativistic beaming model. In addition, we made a comparison of the properties of BL Lacertae objects and flat spectrum radio quasars. We concluded that the association between spectral index and core-dominance parameter is perhaps due to a relativistic beaming effect.
DOI: 10.1113/jphysiol.1996.sp021577
发表时间: 1996-08
期刊: The Journal of Physiology
影响因子: --
作者:
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通讯作者: J. Wagner;B. Alger
DOI: 10.1086/497163
发表时间: 2005-12
期刊: The Astronomical Journal
影响因子: --
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耀变体的射电偏振特性
DOI: 10.1093/pasj/60.4.707
发表时间: 2008-08
影响因子: 2.3
作者:
Huang, Yong;Tao, Jun;Guo, Qian;Gupta, Alok G.;Yuan, Yu-Hai;Liu, Yi;Su, Jiang-Bo;Zhang, Jiang-Shui;Wang, Hong-Guang;Liu, Hua;Romero, Gustavo E.;Zhang, Yong-Wei;Hua, Tong-Xu;Fan, Jun-Hui;Zhang, Jing-Yi
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DOI: 10.1086/174038
发表时间: 1994-05
期刊: The Astrophysical Journal
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作者:
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发表时间: 1994-06
期刊: The Astrophysical Journal
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