论文标题
X射线和伽马射线轨道变异性来自伽马射线二进制HESS J1832-093
X-ray and gamma-ray orbital variability from the gamma-ray binary HESS J1832-093
论文作者
论文摘要
语境。伽马射线二进制文件是由巨大的恒星和紧凑的物体组成的系统，其相互作用导致粒子加速至相对论能量。在过去的十五年中，已经发现一些二进制文件以高能发出，但它们的数量仍然很少。 TEV消息来源Hess J1832-093已被提议为二进制候选人，尽管其性质尚不清楚。 GEV均未找到GEV对应物。目标。这项工作的目的是在GEV Energies中搜索伽马射线来源，以了解TEV信号的来源。对于对其二元性质的明确识别，找到轨道调制至关重要。方法。我们使用X射线望远镜（XRT），Ultraviolet和Optical Telescope（UVOT）分析了从费米大面积望远镜（Fermi-Lat）分析了10年以上的数据，并分析了2015年至2018年之间进行的迅速档案观测。我们使用Lomb-Scargle期间图搜索了X射线和伽马射线带中的周期性。结果。我们在X射线源XMMU J183245-0921539中发现\ sim 86天的定期调制，以及4FGL J1832.9-0913中兼容周期的伽玛射线调制的指示。 X射线源位置均未找到光学和紫外线对应物。整个光谱能分布强烈类似于已知的伽马射线二进制HESS J0632+057。结论。轨道时期的频谱和发现都允许将TEV来源HESS J1832-093识别为Gamma-ray二进制二进制类的新成员。
Context. Gamma-ray binaries are systems composed of a massive star and a compact object whose interaction leads to particle acceleration up to relativistic energies. In the last fifteen years, a few binaries have been discovered to emit at high energies, but their number is still scarce. The TeV source HESS J1832-093 has been proposed as a binary candidate, although its nature is unclear. Neither a GeV counterpart nor a period was found for it. Aims. The purpose of this work is to search for a gamma-ray source at GeV energies to understand the origin of the TeV signal. For an unambiguous identification of its binary nature, finding an orbital modulation is crucial. Methods. We have analysed data spanning more than 10 years from the Fermi Large Area Telescope (Fermi-LAT), together with Swift archival observations taken between 2015 and 2018, using both the X-Ray Telescope (XRT) and UltraViolet and Optical Telescope (UVOT). We searched for periodicities in both X-ray and gamma-ray bands using a Lomb-Scargle periodogram. Results. We find a periodic modulation of \sim 86 days in the X-ray source XMMU J183245-0921539, together with indications of gamma-ray modulation with a compatible period in 4FGL J1832.9-0913. Neither an optical nor an UV counterpart is found at the X-ray source location. The overall spectral energy distribution strongly resembles the known gamma-ray binary HESS J0632+057. Conclusions. Both the spectrum and the discovery of an orbital period allow the identification of the TeV source HESS J1832-093 as a new member of the gamma-ray binary class.
