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arXiv 2005.01276astro-ph.HE
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blazar OJ 287中黑洞-盘碰撞的强子发射模型

A hadronic emission model for black hole-disc impacts in the blazar OJ 287

J. C. Rodríguez-Ramírez, P. Kushwaha, E. M. de Gouveia Dal Pino, R. Santos-Lima

摘要:

在以往的工作中,OJ 287核心的超大质量黑洞双星被用来解释观测到的光学耀斑准周期性。根据这张照片,我们研究了2015年11月该源的主要光学耀斑的X射线和$γ$射线对应物的强子起源。在较轻的SMBH(次级)穿过较重的SMBH(初级)的吸积盘后,必然会产生撞击流出。然后,我们考虑加速宇宙射线(CR)质子的冲击驱动的冲击流出,因为它扩大和碰撞的活动星系核(AGN)风的主要SMBH。我们表明,这些CR的发射可以再现X射线和$γ$射线耀斑数据自洽与2015年11月的主要耀斑的光学组件。导出的发射模型是一致的磁场$B \sim 5$ G的发射区域和幂律指数$q\sim2.2$的能量分布的发射CR。AGN风的机械光度代表了原始SMBH质量吸积功率的$\lesssim 50\%$。

英文摘要:

A super-massive black hole (SMBH) binary in the core of the blazar OJ 287 has been invoked in previous works to explain its observed optical flare quasi-periodicity. Following this picture, we investigate a hadronic origin for the X-ray and $γ$-ray counterparts of the November 2015 major optical flare of this source. An impact outflow must result after the lighter SMBH (the secondary) crosses the accretion disc of the heavier one (the primary). We then consider acceleration of cosmic-ray (CR) protons in the shock driven by the impact outflow as it expands and collides with the active galactic nucleus (AGN) wind of the primary SMBH. We show that the emission of these CRs can reproduce the X-ray and $γ$-ray flare data self-consistently with the optical component of the November 2015 major flare. The derived emission models are consistent with a magnetic field $B \sim 5$ G in the emission region and a power-law index of $q\sim2.2$ for the energy distribution of the emitting CRs. The mechanical luminosity of the AGN wind represents $\lesssim 50\%$ of the mass accretion power of the primary SMBH in all the derived emission profiles.

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