费米耀变体的分裂基于SED峰值频率的诊断
The Fermi blazars' divide based on the diagnostic of the SEDs peak frequencies
摘要：
我们研究了48个LBAS耀变体的准同时光谱能量分布（SED），发现在三个月内的LAT明亮AGN样品（LBAS）的数据拍摄期间，结合费米和斯威夫特数据与无线电近红外光学和硬X/γ射线数据。使用这些准同步的SED，采样的低和高能量峰值的耀变体的宽带发射，我们能够应用诊断工具的基础上估计的峰值频率的同步加速器（S）和逆康普顿（IC）组件。我们的分析表明费米耀变体的划分基于SED的峰值频率。稳健的结果是同步加速器自康普顿（SSC）区域分成两个平面，我们绘制同步加速器SED的峰值频率与对同步加速器发射和逆康普顿过程贡献最大的电子的典型洛伦兹因子的关系。在该区域内或下方的物体，可能通过SSC过程辐射，是高频峰值BL Lac物体（HBL）或低/中频峰值BL Lac物体（LBL/IBL）。在SSC区域内或以下的所有IBL/LBL都不是康普顿主导的。位于SSC区域上方的物体，可能通过外部辐射康普顿（ERC）过程辐射，是平谱射电类星体和IBL/LBL。所有的IBL/LBL在ERC区域显示出显着的康普顿优势。
英文摘要：
We have studied the quasi-simultaneous Spectral Energy Distributions (SED) of 48 LBAS blazars, detected within the three months of the LAT Bright AGN Sample (LBAS) data taking period, combining Fermi and Swift data with radio NIR-Optical and hard-X/gamma-ray data. Using these quasi-simultaneous SEDs, sampling both the low and the high energy peak of the blazars broad band emission, we were able to apply a diagnostic tool based on the estimate of the peak frequencies of the synchrotron (S) and Inverse Compton (IC) components. Our analysis shows a Fermi blazars' divide based on the peak frequencies of the SED. The robust result is that the Synchrotron Self Compton (SSC) region divides in two the plane were we plot the peak frequency of the synchrotron SED vs the typical Lorentz factor of the electrons most contributing to the synchrotron emission and to the inverse Compton process. Objects within or below this region, radiating likely via the SSC process, are high-frequency-peaked BL Lac object (HBL), or low/intermediate-frequency peaked BL Lac object (LBL/IBL). All of the IBLs/LBLs within or below the SSC region are not Compton dominated. The objects lying above the SSC region, radiating likely via the External radiation Compton (ERC) process, are Flat Spectrum Radio Quasars and IBLs/LBLs. All of the IBLs/LBLs in the ERC region show a significant Compton dominance.
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