SN 1987 A区域最近GeV增亮的证据
Evidence for recent GeV brightening of the SN 1987A region
摘要：
我们报告了最近（2016-2018）从SN 1987 A区域观测到的GeV发射增强。观测到的信号的特征在于具有斜率为2.1 +/- 0.2的幂律谱，并且仅在能量>1 GeV时被检测到。费米/LAT数据将信号的位置限制在SN 1987 A周围的0.15度范围内。虽然SN 1987 A最近的伽马射线发射增加似乎是探测到的发射的自然解释，但考虑到源的年轻和快速演变，费米/LAT位置也与其他几个潜在的伽马射线源重叠：30 Dor C，蜂窝星云，RX J0536.9-6913，以及一个假设的，以前未知的瞬态源。我们认为，在未来几年内进行的该地区的多波长观测可以澄清信号的性质，并鼓励这样的观测。我们还提出了基于10年费米/LAT曝光的SN 1987 A的时间平均通量的上限，这可以用来更好地约束该源的粒子加速模型。
英文摘要：
We report on a recent (2016-2018) enhancement of the GeV emission from the SN 1987A region as observed with Fermi/LAT. The observed signal is characterised by a power-law spectrum with a slope of 2.1 +/- 0.2 and is detected only at energies >1 GeV. The Fermi/LAT data constrain the position of the signal to within 0.15 degree around SN 1987A. Although a recent increase in the gamma-ray emission from SN 1987A seems to be a natural explanation for the detected emission, given the youth of the source and its rapid evolution, the Fermi/LAT location also overlaps with several other potential gamma-ray sources: 30 Dor C, Honeycomb nebula, RX J0536.9-6913, and a hypothetical, previously unknown transient source. We argue that multiwavelength observations of the region performed during the next few years can clarify the nature of the signal and encourage such observations. We also present upper limits on the time-averaged flux of SN 1987A based on 10 years of Fermi/LAT exposure, which can be used to better constrain the particle acceleration models of this source.
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。
