论文标题
WR-WR系统APEP的非热发射的限制
Limits on the non-thermal emission of the WR-WR system Apep
论文作者
论文摘要
碰撞的二进制文件（CWBS）构成了新兴类别的$γ$ - 射线来源，由强烈的恒星系统中强，强风提供动力。其中最强大的是那些拥有狼射线（WR）明星的二进制文件。在最近发现的APEP（最接近的银河WR-二元）之后，我们在这封信中讨论了费米大面积望远镜（Fermi-lat）对其假定的高能排放的未检测。在GEV方案中报告的限制可用于设置冲击风碰撞区域（WCR）内磁场压力密度的下限，并将APEP排除为明亮的伽马射线发射二进制。鉴于此WR-WR系统是迄今为止在无线电波长下识别出的最发光的CWB，因此该结果明确证明了非热同步子发射不是适合在这类粒料加速器中伽马射线发射器子集的子集的合适标识符。相反，APEP可能是一个有趣的研究案例，用于震惊的恒星风中的磁场扩增。
Colliding-wind binaries (CWBs) constitute an emerging class of $γ$-ray sources powered by strong, dense winds in massive stellar systems. The most powerful of them are those binaries hosting a Wolf-Rayet (WR) star. Following the recent discovery of Apep -- the closest known Galactic WR--WR binary -- we discuss the non-detection of its putative high-energy emission by the Fermi Large Area Telescope (Fermi-LAT) in this Letter. The limits reported in the GeV regime can be used to set a lower limit on the magnetic field pressure density within the shocked wind-collision region (WCR), and to exclude Apep as a bright gamma-ray emitting binary. Given that this WR--WR system is the most luminous CWB identified until now at radio wavelengths, this result proves unambiguously that non-thermal synchrotron emission is not a suitable identifier for the subset of gamma-ray emitters in this class of particle accelerators. Rather, Apep could be an interesting case of study for magnetic field amplification in shocked stellar winds.
