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arXiv 2108.01048astro-ph.HE
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模拟HAWC gamma ray观测站探测到的M87的非燃烧VHE排放

Modeling the non-flaring VHE emission from M87 as detected by the HAWC gamma ray observatory

Fernando Ureña-Mena, Alberto Carramiñana, Anna Lia Longinotti, Daniel Rosa-González

摘要:

M87是一个巨大的射电星系,位于室女星系团,是一个非常高能量的伽马射线源。由于射电星系被认为是耀变体的错位低红移对应物,它们是检验活动星系核发射模型的极好实验室。M87已经被费米-LAT和几个大气切伦科夫望远镜探测和监测。最近,HAWC合作提出了4.5年TeV伽马射线发射的边缘证据。HAWC的数据有可能限制VHE的平均排放源的复杂行为,如M87,VHE伽马射线发射的物理起源仍然是不确定的。我们拟合了一个轻强子方案的宽带光谱能量分布的M87模型的非耀斑VHE发射使用HAWC数据。

英文摘要:

M87 is a giant radio galaxy located in the Virgo Cluster, known to be a very high energy (VHE) gamma-ray source. As radio galaxies are considered the misaligned low-redshift counterparts of blazars, they are excellent laboratories for testing AGN emission models. M87 has been detected and monitored by Fermi-LAT and several atmospheric Cherenkov telescopes. Recently, the HAWC Collaboration presented marginal evidence of 4.5 year TeV gamma-ray emission from this object. The HAWC data has the potential to constrain the average VHE emission of sources of complex behavior, like M87, for which the physical origin of the VHE gamma-ray emission is still uncertain. We fitted a lepto-hadronic scenario to the broadband spectral energy distribution of M87 to model its non-flaring VHE emission using HAWC data.

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