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首页> 外文会议>The energetic cosmos : from Suzaku to ASTRO-H >Suzaku and multi-wavelength observations of a super massive binary black hole candidate, OJ 287
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Suzaku and multi-wavelength observations of a super massive binary black hole candidate, OJ 287

机译：巨型二元黑洞候选者OJ 287的朱雀和多波长观测

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摘要

Suzaku observations of the blazar OJ 287 were performed in a quiescent and a flaring state in 2007. The X-ray spectra of the source were well described with single power-law models in both exposures. In the flaring state, the spectrum was harder with significant hard X-ray signals were detected up to ~ 27 keV, and the X-ray flux density was a factor of two higher, compared with that of the quiescent state. In cooperation with the Suzaku, simultaneous radio, optical, and very-high-energy 7-ray observations were performed with the Nobeyama Millimeter Array, the KANATA telescope, and the MAGIC telescope, respectively. The obtained spectral energy distribution of OJ 287 indicated that the X-ray spectrum was dominated by inverse Compton radiation in both observations, while the synchrotron component exhibited a spectral cutoff around the optical frequency. According to a simple synchrotron self-Compton model, it is estimated that the change of the spectral energy distribution was due to an increase in the energy density of electrons with small changes of both the magnetic field strength and the maximum Lorentz factor of electrons.
机译：Suzaku对blazar OJ 287的观测在2007年处于静止和燃烧状态。在两次曝光中均使用单一幂律模型很好地描述了源的X射线光谱。在张开状态下，光谱更加坚硬，在高达〜27 keV的条件下检测到了明显的硬X射线信号，与静态相比，X射线通量密度高了两倍。与朱雀队合作，分别用野部山毫米波阵列，坎那塔望远镜和MAGIC望远镜同时进行了无线电，光学和超高能7射线观测。获得的OJ 287的光谱能量分布表明，在两个观察中，X射线光谱均以康普顿逆辐射为主，而同步加速器组件在光频率附近表现出光谱截止。根据一个简单的同步加速器自康普顿模型，据估计，光谱能量分布的变化是由于电子的能量密度增加，而磁场强度和电子的最大洛伦兹因子变化很小。

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