Modelling the interaction of thermonuclear supernova remnants with circumstellar structures: the case of Tycho's supernova remnant
Modelling the interaction of thermonuclear supernova remnants with circumstellar structures: the case of Tycho's supernova remnant
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DOI：
10.1093/mnras/stt1406
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发表时间：
2013-07
影响因子：
4.8
通讯作者：
A. Chiotellis;D. Kosenko;K. Schure;J. Vink;J. Kaastra
中科院分区：
文献类型：
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作者：
A. Chiotellis;D. Kosenko;K. Schure;J. Vink;J. Kaastra
第谷超新星 (SN 1572) 的公认的 Ia 型遗迹揭示了基于测量的动力学或 X 射线发射特性的环境介质密度估计的差异。这种差异可以通过假设超新星遗迹（SNR）激波最初穿过恒星风泡移动，但目前正在密度相对较低的均匀星际介质中演化来解决。我们通过将风损阶段的流体动力学模拟和 SNR 演变与耦合 X 射线发射模型（其中包括非平衡电离）相结合来研究这种情况。对于爆炸模型，我们使用著名的 W7 爆燃模型和延迟爆炸模型，该模型先前已被证明可以很好地拟合第谷 SNR 的 X 射线发射。我们的模拟证实，均匀的环境密度无法同时再现第谷的动力学和 X 射线发射特性。相比之下，认为残余物在密集但小风泡中演化的模型可以很好地再现测量到的 X 射线发射光谱和第谷信噪比的膨胀参数。最后，我们在单简并模型和双简并模型的背景下讨论可能的质量损失场景，这些模型可能会形成如此小的密集风泡。
The well-established Type Ia remnant of Tycho's supernova (SN 1572) reveals discrepant ambient medium-density estimates based on either the measured dynamics or the X-ray emission properties. This discrepancy can potentially be solved by assuming that the supernova remnant (SNR) shock initially moved through a stellar wind bubble, but is currently evolving in the uniform interstellar medium with a relatively low density. We investigate this scenario by combining hydrodynamical simulations of the wind-loss phase and the SNR evolution with a coupled X-ray emission model, which includes non-equilibrium ionization. For the explosion models we use the well-known W7 deflagration model and the delayed detonation model that was previously shown to provide good fits to the X-ray emission of Tycho's SNR. Our simulations confirm that a uniform ambient density cannot simultaneously reproduce the dynamical and X-ray emission properties of Tycho. In contrast, models that considered that the remnant was evolving in a dense, but small, wind bubble reproduce reasonably well both the measured X-ray emission spectrum and the expansion parameter of Tycho's SNR. Finally, we discuss possible mass-loss scenarios in the context of single- and double-degenerate models which possibly could form such a small dense wind bubble.