摘要
在１９９１—１９９３年期间，Ｃｏｍｐｔｏｎγ射线天文台（ＣＧＲＯ）在射电源ＰＫＳ０５２８＋１３４中观测到两次很强的射线爆发，都伴随有毫米波射电大爆发．本文详细分析了高能γ－Ｘ射线波段和红外－光学波段的辐射能量分布（ＳＥＤ）．结果表明，高能γ射线辐射可能主要是由喷流相对论电子对周围ＵＶ－软Ｘ射线光子的逆康普顿散射所产生的．同时，通过毫米波射电大爆发的频谱演化特性与γ射线源的同步辐射频谱特性的比较，对γ辐射等离子团和射电等离子团之间可能的演化联系作了讨论．
During the period of 1991—1993 two strong high energy γray flares were observed by the Compton Gamma Ray Observatory in the flat spectrum radio source PKS 0528+134.They were associated with strong mmradio outbursts with a few months timedelays.In this paper the spectral energy distributions(SED)of the radiations in the γhard Xray and the IRoptical bands are analysed.It is shown that the high energy γray radiation may be due to the inverse Compton scattering of the ambient UV and soft Xray photons by the relativistic electrons in the jet.Basing on the comparison between the properties of the synchrotron radiation of the γray source and the spectral evolution of themm-radio outbursts,the evolutional relationship between the γray emitting blobs and the mmradio emitting blobs is discussed.
基金
国家自然科学基金
中国科学院天文委员会资助
