标题： 超新星遗迹3C 397的Ia型前身证据 显示英文标题

标题： Evidence of a Type Ia Progenitor for Supernova Remnant 3C 397

摘要： 年老超新星遗迹 (SNR) 3C 397 (G41.1-0.3) 的爆发起源尚存争议。其拉长的形态以及靠近分子云的特性暗示了其可能源于核心塌缩 (CC) 超新星，然而最近关于重金属的 X 射线研究显示化学产额和线心能与 Ia 型超新星一致。本文中，我们分析了由 Suzaku 观测到的 3C 397 在 0.7-10 keV 范围内的完整 X 射线光谱，并将中间质量和重元素（镁到镍）的线心能、流量及元素丰度与 Ia 型和 CC 水动力学模型预测值进行了比较。基于结果，我们认为 3C 397 很可能源于高密度环境中的强 Ia 型爆炸，并且证明其前身天体质量接近钱德拉塞卡极限白矮星。 显示英文摘要

摘要： The explosive origin of the young supernova remnant (SNR) 3C 397 (G41.1-0.3) is debated. Its elongated morphology and proximity to a molecular cloud are suggestive of a core-collapse (CC) SN origin, yet recent X-ray studies of heavy metals show chemical yields and line centroid energies consistent with a Type Ia SN. In this paper, we analyze the full X-ray spectrum from 0.7-10 keV of 3C 397 observed with Suzaku and compare the line centroid energies, fluxes, and elemental abundances of intermediate-mass and heavy metals (Mg to Ni) to Type Ia and CC hydrodynamical model predictions. Based on the results, we conclude that 3C 397 likely arises from an energetic Type Ia explosion in a high-density ambient medium, and we show that the progenitor was a near Chandrasekhar mass white dwarf.