论文标题
建模蟹状星云的最广泛光谱和限制离子加速效率
Modeling the broadest spectral band of the Crab nebula and constraining the ions acceleration efficiency
论文作者
论文摘要
尽管人们普遍认为，电磁光谱从无线电到非常高的能量$γ$ - 脉冲星风星云（PWNE）起源于lept子，但仍有一个开放的问题，即质子（或更普遍，离子）可能存在于Pulsar Wind中，并进一步加速了PWN。原型PWN螃蟹的宽带光谱最近通过将西藏作为$γ$和HAWC实验在100 TEV以上的$γ$中延伸而扩展，可能有助于限制离子的加速效率。在这里，我们对螃蟹的最广泛能量谱进行建模，并发现宽带光谱可以通过单区Leptonic模型来解释，该模型可以通过同步过程通过同时发生GEV-TEEV $γ$ -rays的过程，其中电子/正电子从无线电到柔软的$γ$ rays产生了从无线电到软$γ$ - rays的发射。在这个Leptonic模型的框架中，转换为能量质子的能量的比例被限制为$ 0.5 \（n _ {\ rm t}/10 \ {\ rm cm}^{ - 3} { - 3} { - 3} { - 3}）但是，此分数最高可达$ 7 \（n _ {\ rm t}/10 \ {\ rm cm}^{ - 3} { - 3}）^{ - 1} $％，如果仅使用$γ$ -rays。
Although it is widely accepted that the electromagnetic spectrum from radio to very-high-energy $γ$-rays of pulsar wind nebulae (PWNe) originates from leptons, there is still an open question that protons (or more generally, ions) may exist in pulsar wind and are further accelerated in PWN. The broadband spectrum of the prototype PWN Crab, extended recently by the detection of the Tibet AS$γ$ and HAWC experiments above 100 TeV, may be helpful in constraining the acceleration efficiency of ions. Here, we model the broadest energy spectrum of Crab and find that the broadband spectrum can be explained by the one-zone leptonic model in which the electrons/positrons produce the emission from radio to soft $γ$-rays via the synchrotron process, and simultaneously generate the GeV-TeV $γ$-rays through inverse Compton scattering including the synchrotron self-Compton process. In the framework of this leptonic model, the fraction of energy converted into the energetic protons is constrained to be below $0.5\ (n_{\rm t}/10\ {\rm cm}^{-3})^{-1}$ per cent, where $n_{\rm t}$ is the target gas density in the Crab. However, this fraction can be up to $7\ (n_{\rm t}/10\ {\rm cm}^{-3})^{-1}$ per cent if only the $γ$-rays are used.
