论文标题
IC 348中非常低的质量星的快速光度变异性：M-warf中的超叶片检测
Fast Photometric Variability of Very Low Mass Stars in IC 348: Detection of Superflare in an M-dwarf
论文作者
论文摘要
我们在这里提出了光学I带光度可变性研究，降低到$ \ simeq $ 19的杂志（$ \ sim $ \ sim $ 2-3 Myr）恒星形成区域IC 348在Perseus Molecular Cloud中。我们的目标是探索非常低的质量恒星（VLM）（包括棕色矮人（BDS））的快速旋转（在时间尺度上）。从使用新的I带观测值的177种曲折的样本中，我们检测到22个年轻的M型warfs中的新光度变异性，包括6个BD，它们是IC 348中的真正成员，并且在光谱类型的M-Dwarfs中良好表征。在22个变量中，有11 m矮人在3.5-11小时范围内的一个BD显示小时周期性变异性本质上是Aperiodic的。有趣的是，2016年12月20日的一晚数据中，在一个年轻的M2.75矮人中检测到光耀斑。从耀斑曲线来看，我们估计发射的爆发能量为1.48 $ \ times $ 10 $^{35} $ ergs。观察到的喇叭形能量与数百分之百分之的不确定性接近超级漏斗系列（$ \ sim $ 10 $^{34} $ ergs），在活动的M矮人中很少观察到。
We present here optical I-band photometric variability study down to $\simeq$ 19 mag of a young ($\sim$2-3 Myr) star-forming region IC 348 in the Perseus molecular cloud. We aim to explore the fast rotation (in the time-scales of hours) in Very Low Mass stars (VLMs) including Brown Dwarfs (BDs). From a sample of 177 light-curves using our new I-band observations, we detect new photometric variability in 22 young M-dwarfs including 6 BDs, which are bonafide members in IC 348 and well-characterized in the spectral type of M-dwarfs. Out of 22 variables, 11 M dwarfs including one BD show hour-scale periodic variability in the period range 3.5 - 11 hours and rest are aperiodic in nature. Interestingly, an optical flare is detected in a young M2.75 dwarf in one night data on 20 December 2016. From the flare light curve, we estimate the emitted flared energy of 1.48 $\times$ 10$^{35}$ ergs. The observed flared energy with an uncertainty of tens of per cent is close to the super-flare range ($\sim$ 10$^{34}$ ergs), which is rarely observed in active M dwarfs.
