eV Blazar 3C 66A的多波段辐射分析及其红移的限制
Multi-frequency emission analysis and constraining redshift of 3C 66A
eV blazar 3C 66A的红移0.444这个值有争议,并且其SED不能用SSC拟合。采用一个包含EBL吸收的多成分辐射模型拟合了3C 66A的准同时性多波段数据。结果显示当红移为0.21时拟合结果最好,其0.1GeV-10GeV的辐射由SSC贡献,10GeV以上的辐射由SSC成分和EC-BLR成分共同贡献。通过拟合从光学,X-ray到GeV波段准同时性的数据可以把SED外推到VHE能区；同时采用一个中等强度的EBL模型用不同的红移修正观测的VHE谱,通过比较外推的VHE谱和EBL修正的VHE谱,可以限制3C 66A的红移。结果显示3C 66A的红移在0.15-0.31之间,最可能的值为0.21。对模型参数对限制结果的影响也进行了讨论。同时,拟合结果限制3C 66A的辐射区处在BLR的外区域。
he emission mechanism of TeV blazar 3C 66A is studied employingmulti-wavelength observational data. The GeV spectrum observed by extit{Fermi}-LAT cannot be explained by pure synchrotronself-Compton (SSC) radiation. A multi-component leptonic jet modelincluding the absorption of extragalactic background lightreproduces the quasi-simultaneous spectral energy distribution. Theexternal Compton component of the broad line region (BLR) isimportant for emission above 10 GeV, while emission from 0.1 GeV to10 GeV is dominated by the SSC component. Our model implies that theredshift of 3C 66A should be between 0.15 and 0.31, the most likelyvalue being 0.21. Our results also indicate that the $gamma$-rayemission region is beyond the inner zone of BLR. The effects of modelparameters and assumptions on the estimating of the redshift are discussed.
闫大海、范忠辉、戴本忠
天文学
耀变体：3C 66A--活动星系核--伽马辐射--辐射机制：非热
BL Lacertae objects: individual: 3C 66A -- galaxies: active -- gammarays: general -- radiation mechanisms: non-thermal.
闫大海,范忠辉,戴本忠.eV Blazar 3C 66A的多波段辐射分析及其红移的限制[EB/OL].(2011-04-15)[2025-08-16].http://www.paper.edu.cn/releasepaper/content/201104-358.点此复制
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