We present an analysis of the structure, kinematics and orbit of a newly found stellar stream emanating from the globular cluster M92 (NGC 6341). This stream was discovered in an improved matched-filter map of the outer Galaxy, based on a "color-color-magnitude" diagram, created using photometry from the Canada-France Imaging Survey (CFIS) and the Pan-STARRS 1 3$\pi$ survey (PS1). We find the stream to have a length of 17° (2.5 kpc at the distance of M92), a width dispersion of $0.29$°(42 pc) and a stellar mass of $[3.17 \pm{0.89}] \times 10^{4} $ M$_\odot$ ($10 \%$ of the stellar mass of the current main body of M92). We examine the kinematics of main sequence, red giant and blue horizontal branch stars belonging to the stream and that have proper motion measurements from the second data release of Gaia. N-body simulations suggest that the stream was likely formed very recently (during the last $\sim 500$ Myr) forcing us to question the orbital origin of this ancient, metal-poor globular cluster.

中文翻译：

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M92 的隐藏过去：使用加拿大-法国成像调查探测和表征新形成的 17°长恒星流

我们对新发现的源自球状星团 M92 (NGC 6341) 的恒星流的结构、运动学和轨道进行了分析。该流是在外星系的改进匹配过滤器地图中发现的，该地图基于“颜色-颜色-幅度”图，使用加拿大-法国成像调查 (CFIS) 和 Pan-STARRS 1 3$\ pi$ 调查 (PS1)。我们发现流的长度为 17°（在 M92 距离处为 2.5 kpc），宽度为 $0.29$°（42 pc），恒星质量为 $[3.17 \pm{0.89}] \times 10^ {4} $ M$_\odot$（M92当前主体恒星质量的$10\%$）。我们检查了属于流的主序星、红巨星和蓝色水平分支星的运动学，它们具有来自盖亚第二次数据发布的自行测量。