论文标题
调查100 TEV源EHWC J2019 $+$ 368的多播非热发射与脉冲星风云场景
Investigating the multiband nonthermal emission of the 100 TeV source eHWC J2019$+$368 with a pulsar wind nebula scenario
论文作者
论文摘要
EHWC J2019+368是发射$γ$的来源之一，基于最近的测量值，其能量高于100 TEV，而高空水Cherenkov天文台（HAWC），其起源仍在争论中。 Pulsar PSR J2021 $+$ 3651在空间上与TEV源一致。从理论上讲，我们研究EHWC J2019+368的多播种非热发射是否源自Pulsar Wind Nebula（PWN）G75.2 $+$ 0.1由PSR J2021 $+$ 3651供电。在模型中，脉冲星的旋转功率被转移到星云中的高能颗粒和磁场上。由于具有破碎的幂律或幂律的能量分布不断注入星云的颗粒，因此通过同步加速器辐射和compton compton散射产生了多播非热发射。具有合理参数的模型中星云的光谱能分布通常与检测到的无线电，X射线和TEV $γ$ -Ray通量一致。我们的研究支持PWN能够生产EHWC J2019+368的TEV $γ$ rays，而星云中最有能量的颗粒的能量约为$ 0.4 $ PEV。
eHWC J2019+368 is one of the sources emitting $γ$-rays with energies higher than 100 TeV based on the recent measurement with the High Altitude Water Cherenkov Observatory (HAWC), and the origin is still in debate. The pulsar PSR J2021$+$3651 is spatially coincident with the TeV source. We investigate theoretically whether the multiband nonthermal emission of eHWC J2019+368 can originate from the pulsar wind nebula (PWN) G75.2$+$0.1 powered by PSR J2021$+$3651. In the model, the spin-down power of the pulsar is transferred to high-energy particles and magnetic field in the nebula. As the particles with an energy distribution of either a broken power-law or a power-law continually injected into the nebula, the multiband nonthermal emission is produced via synchrotron radiation and inverse Compton scattering. The spectral energy distribution of the nebula from the model with the reasonable parameters is generally consistent with the detected radio, X-ray and TeV $γ$-ray fluxes. Our study supports that the PWN has the ability to produce the TeV $γ$-rays of eHWC J2019+368, and the most energetic particles in the nebula have energies up to about $0.4$ PeV.
