论文标题
来自伽马射线二进制系统LS 5039的硬X射线脉动的迹象
Sign of hard X-ray pulsation from the gamma-ray binary system LS 5039
论文作者
论文摘要
为了了解最明亮的伽马射线二进制系统LS 5039的性质，分别分析了2007年和2016年使用Suzaku和Nustar观测值进行的对象的硬X射线数据。这两个数据集共同提供了硬X射线周期性的初步证据，$ \ sim 9 $ s，$ \ sim 3 \ sim 3 \ times 10^{ - 10} $ s s $ s $ s $^{ - 1} $提高率。因此，LS 5039中的紧凑物体被推断为旋转的中子星，而不是黑洞。此外，几行参数表明，该对象的磁场几次$ \ sim 10^{10} $ t，比典型中子星的磁场高两个数量级。因此，该物体被认为是磁性，这将是第一个在二进制中找到的磁力。结果还表明，高效的颗粒加速过程（已知在LS 5039中运行）通过来自巨大的原代恒星的密集恒星风与磁场的超湿磁场之间的相互作用而出现。
To understand the nature of the brightest gamma-ray binary system LS 5039, hard X-ray data of the object, taken with the Suzaku and NuSTAR observatories in 2007 and 2016, respectively, were analyzed. The two data sets jointly gave tentative evidence for a hard X-ray periodicity, with a period of $\sim 9$ s and a period increase rate by $\sim 3 \times 10^{-10}$ s s$^{-1}$. Therefore, the compact object in LS 5039 is inferred to be a rotating neutron star, rather than a black hole. Furthermore, several lines of arguments suggest that this object has a magnetic field of several times $\sim 10^{10}$ T, two orders of magnitude higher than those of typical neutron stars. The object is hence suggested to be a magnetar, which would be the first to be found in a binary. The results also suggest that the highly efficient particle acceleration process, known to be operating in LS 5039, emerges through interactions between dense stellar winds from the massive primary star, and ultra-strong magnetic fields of the magnetar.
