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arXiv 1102.5333astro-ph.HE
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超新星遗迹G350 .1-0.3及其中心致密天体的Chandra观测

A Chandra Observation of Supernova Remnant G350.1-0.3 and Its Central Compact Object

Igor Lovchinsky, Patrick Slane, Bryan Gaensler, John Patrick Hughes, C. -Y. Ng, Jasmina Lazendic-Galloway, Joseph Gelfand, Crystal Brogan

摘要:

我们提出了一个新的钱德拉观测超新星遗迹(SNR)G350.1-0.3。高分辨率的X射线数据揭示了以前未解决的结构,使我们能够在这个SNR的扩散区域进行详细的光谱分析。光谱分析表明,最亮的发射区域主要是热的,富含金属的喷出物,而周围的物质沿周边的喷出物区域和整个残余的西半部主要是低温,冲击星际/拱星介质(ISM/CSM)与太阳型成分。数据显示,发射延伸到喷出物区域的西部,意味着源直径的下限为6.6 pc(距离为4.5 kpc)。我们表明,G350.1-0.3可能处于自由膨胀(喷出物为主)阶段,并计算出600-1200年的年龄。导出的激波速度和电子/质子温度比之间的关系被发现是完全一致的,与其他SNR。我们进行光谱拟合的X射线源XMMU J172054.5-372652,一个候选人的中央紧凑型对象(CCO),并发现其光谱特性属于其他CCO的典型范围内。我们还提出了档案24 μ m的数据G350.1-0.3采取的斯皮策太空望远镜在MIPSGAL银河系调查,发现红外和X射线的形态是相关的。这些结果有助于解释这一遗迹特有的不对称性,并为它的动力学和演化提供了新的线索。

英文摘要:

We present a new Chandra observation of supernova remnant (SNR) G350.1-0.3. The high resolution X-ray data reveal previously unresolved filamentary structures and allow us to perform detailed spectroscopy in the diffuse regions of this SNR. Spectral analysis demonstrates that the region of brightest emission is dominated by hot, metal-rich ejecta while the ambient material along the perimeter of the ejecta region and throughout the remnant's western half is mostly low-temperature, shocked interstellar/circumstellar medium (ISM/CSM) with solar-type composition. The data reveal that the emission extends far to the west of the ejecta region and imply a lower limit of 6.6 pc on the diameter of the source (at a distance of 4.5 kpc). We show that G350.1-0.3 is likely in the free expansion (ejecta-dominated) stage and calculate an age of 600-1200 years. The derived relationship between the shock velocity and the electron/proton temperature ratio is found to be entirely consistent with that of other SNRs. We perform spectral fits on the X-ray source XMMU J172054.5-372652, a candidate central compact object (CCO), and find that its spectral properties fall within the typical range of other CCOs. We also present archival 24 um data of G350.1-0.3 taken with the Spitzer Space Telescope during the MIPSGAL galactic survey and find that the infrared and X-ray morphologies are well-correlated. These results help to explain this remnant's peculiar asymmetries and shed new light on its dynamics and evolution.

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