论文标题
基于深H.E.S.S.观察
Evidence for gamma-ray emission from the remnant of Kepler's supernova based on deep H.E.S.S. observations
论文作者
论文摘要
通过成像大气Cherenkov望远镜(IACTS)进行的观察,通过建立Cassiopeia a和Tycho的SN残留物,增强了我们对附近超新星(SN)残留物的了解,因为年龄在500年中的年龄不到500年。开普勒SN的残留物是我们银河系中最新的裸眼超新星的产物,其年龄与其他两个相媲美,但距离要远得多。如果Tycho和Kepler的SNE残留物的伽马射线光度相似,那么后者有望成为当前一代IACAT阵列范围内最微弱的伽马射线源之一。 在这里,我们报告了基于高能量立体镜面系统(H.E.S.S.)的深入观察,从开普勒SN的残留物(H.E.S.S.)的统计水平的统计水平为4.6 Sigma的证据,暴露于152小时。高于226 GEV的能量上方测得的积分通量约为蟹状通量的0.3%。光谱能分布(SED)揭示了连接使用H.E.S.S.的VHE发射的伽马射线发射组件在用费米 - 拉特的GEV能量观察到的发射。总体SED与Tycho的SN残留物相似,这可能表明在这两种热核SNE的年轻残留物中都作用相同的非热发射过程。
Observations with imaging atmospheric Cherenkov telescopes (IACTs) have enhanced our knowledge of nearby supernova (SN) remnants with ages younger than 500 years by establishing Cassiopeia A and the remnant of Tycho's SN as very-high-energy (VHE) gamma-ray sources. The remnant of Kepler's SN, which is the product of the most recent naked-eye supernova in our Galaxy, is comparable in age to the other two, but is significantly more distant. If the gamma-ray luminosities of the remnants of Tycho's and Kepler's SNe are similar, then the latter is expected to be one of the faintest gamma-ray sources within reach of the current generation IACT arrays. Here we report evidence at a statistical level of 4.6 sigma for a VHE signal from the remnant of Kepler's SN based on deep observations by the High Energy Stereoscopic System (H.E.S.S.) with an exposure of 152 hours. The measured integral flux above an energy of 226 GeV is ~0.3% of the flux of the Crab Nebula. The spectral energy distribution (SED) reveals a gamma-ray emitting component connecting the VHE emission observed with H.E.S.S. to the emission observed at GeV energies with Fermi-LAT. The overall SED is similar to that of the remnant of Tycho's SN, possibly indicating the same non-thermal emission processes acting in both these young remnants of thermonuclear SNe.