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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Suzaku view of the supernova remnant RCW 86: X-ray studies of newly-discovered Fe-rich ejecta
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Suzaku view of the supernova remnant RCW 86: X-ray studies of newly-discovered Fe-rich ejecta

机译：朱雀的超新星残余RCW 86视点：新发现的富含铁的射流的X射线研究

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摘要

We report on results of imaging and spectral analysis of the supernova remnant (SNR) RCW 86 observed with Suzaku. The SNR is known to exhibit K-shell emission of low ionized Fe, possibly originating from supernova ejecta. We revealed the global distribution of the Fe-rich plasma in the entire remnant, for the first time; the Fe-K emission was clearly detected from the west, north, and south regions, in addition to the X-ray brighter shells of southwest and northeast, where the presence of the Fe-rich ejecta has already been reported. The spectrum of each region is well represented by a three-component model consisting of low- and high-temperature thermal plasmas and non-thermal emission. The lower-temperature component, with elemental abundances of near the solar values, likely originates from the forward shocked interstellar medium, while the Fe-rich ejecta is described by the hotter plasma. From the morphologies of the forward and reverse shocks in the west region, the total ejecta mass is estimated to be 1-2M _⊙ for the typical explosion energy of ～1 × 10 ~(51) erg. The integrated flux of the Fe-K emission from the entire SNR roughly corresponds to a total Fe mass of about 1M _⊙. Both of these estimates suggest a Type Ia supernova origin of this SNR. We also find possible evidence of an Fe-rich clump located beyond the forward-shock front in the north rim, which is reminiscent of ejecta knots observed in the Tycho and Vela SNRs.
机译：我们报告了朱雀观测到的超新星遗迹（SNR）RCW 86的成像和光谱分析结果。已知SNR表现出低离子化Fe的K壳发射，这可能源自超新星喷射。我们首次揭示了整个残渣中富铁血浆的全球分布;除西南和东北部的X射线亮壳外，已经从西部，北部和南部地区清楚地检测到了Fe-K发射，在该处已经报道了富铁喷出物的存在。每个区域的光谱可以很好地表示为三组分模型，该模型由低温和高温热等离子体和非热辐射组成。较低的温度分量，其元素丰度接近太阳值，很可能起源于向前撞击的星际介质，而富含铁的射流由较热的等离子体描述。根据西部地区正向和反向冲击的形貌，对于典型的〜1×10〜（51）erg爆炸能量，总射出质量估计为1-2M_⊙。来自整个SNR的Fe-K发射的积分通量大致对应于大约1M的总Fe质量。这两个估计都表明该SNR是Ia类超新星起源。我们还发现可能的证据表明，富铁团块位于北缘的前向冲击波前，这使人联想到在第谷（Tycho）信噪比和维拉信噪比中观察到的喷射结。

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