arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1707.04280astro-ph.HE
收藏

GeV检测HESS J0632 +057

GeV detection of HESS J0632+057

Jian Li, Diego F. Torres, K. -S. Cheng, Emma de Ona Wilhelmi, Peter Kretschmar, Xian Hou, Jumpei Takata

摘要:

HESS J 0632 +057是唯一一颗在TeV能量下被探测到的伽马射线双星,但还没有在GeV能量下被探测到。基于近九年的费米大面积望远镜(LAT)Pass 8数据,我们在这里报告了对HESS J 0632 +057在0.1-300 GeV能量范围内的伽马射线发射的深入搜索。我们发现一个以前未知的伽马射线源,费米J0632.6+0548,空间上符合HESS J 0632 +057。费米J0632.6+0548的测量通量与HESS J 0632 +057的通量上限一致,并显示出与HESS J 0632 +057轨道相位相关的变化。我们提出费米J 0632.6 +0548是HESS J 0632 +057的GeV对应物。考虑到HESS J 0632 +057的甚高能(VHE)光谱,费米J0632.6+0548中可能存在高于10 GeV的光谱翻转,这在其他已建立的伽马射线双星中似乎很常见。

英文摘要:

HESS J0632+057 is the only gamma-ray binary that has been detected at TeV energies, but not at GeV energies yet. Based on nearly nine years of Fermi Large Area Telescope (LAT) Pass 8 data, we report here on a deep search for the gamma-ray emission from HESS J0632+057 in the 0.1-300 GeV energy range. We find a previously unknown gamma-ray source, Fermi J0632.6+0548, spatially coincident with HESS J0632+057. The measured flux of Fermi J0632.6+0548 is consistent with the previous flux upper limit on HESS J0632+057 and shows variability that can be related to the HESS J0632+057 orbital phase. We propose that Fermi J0632.6+0548 is the GeV counterpart of HESS J0632+057. Considering the Very High Energy (VHE) spectrum of HESS J0632+057, a possible spectral turnover above 10 GeV may exist in Fermi J0632.6+0548, as appears to be common in other established gamma-ray binaries.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑