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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >The shortest periodic and flaring flux variability of a methanol maser emission at 6.7 GHz in G 014.23-00.50
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The shortest periodic and flaring flux variability of a methanol maser emission at 6.7 GHz in G 014.23-00.50

机译：在G 014.23-00.50中的6.7 GHz时，甲醇爆发发射的最短周期和辐射助熔剂可变异

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摘要

We detected flaring flux variability that regularly occurred with a period of 23.9 d on a 6.7 GHz methanol maser emission at V-lsr = 25.30 km s(-1) in G 014.23-00.50 through highly frequent monitoring using the Hitachi 32m radio telescope. Analyzing data from 2013 January 5 to 2016 January 21, the periodic variability has persisted in at least 47 cycles, corresponding to similar to 1100 d. The period of 23.9 d is the shortest one observed in masers around high-mass young stellar objects so far. The flaring component normally falls below the detection limit (3 sigma) of similar to 0.9 Jy. In the flaring periods, the component rises above the detection limit with a ratio of the peak flux density more than 180 in comparison with the quiescent phase, showing intermittent periodic variability. The timescale of the flux rise was typically two days or shorter, and both symmetric and asymmetric profiles of flux variability were observed through intraday monitoring. These characteristics might be explained by a change in the flux of seed photons in a colliding-wind binary (CWB) system, or a variation of the dust temperature by the extra heating source of a shock formed by a CWB system within a gap region in a circumbinary disk, in which the orbital semi-major axes of the binary are 0.26-0.34 au.
机译：我们通过使用Hitachi 32M Radio望远镜的高度频繁监测，在V-LSR = 25.30mps（-1）的6.7GHz甲醇爆发（-1）中，检测到定期发生的燃烧通量变异性。分析2013年1月5日至2016年1月21日的数据，定期变异性至少在47个周期中持续存在，对应于1100天。到目前为止，23.9天的时间是在迄今为止大量青少年恒星物体周围的口号观察到的最短。喇叭形元件通常低于类似于0.9 JY的检测限（3Σ）。在喇叭形时段中，与静止相位相比，峰值磁通密度与峰值磁通密度的比率的比率升高了检测极限，显示间歇性周期性变异性。磁通量上升的时间质量通常为两天或更短，通过盘子内监测观察到助焊剂变异性的对称和不对称谱。这些特征可以通过碰撞 - 风二进制（CWB）系统中的种子光子的通量变化，或者通过在间隙区域内的CWB系统形成的冲击的额外加热源的额外加热源的变化来解释一条圆点盘，其中二元的轨道半主轴为0.26-0.34 au。

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