论文标题
LMC SNR 0509-67.5的X射线适当运动研究
An X-ray Proper Motion Study of the LMC SNR 0509-67.5
论文作者
论文摘要
我们介绍了Chandra型大型麦哲伦云超新星残留物（SNR）0509-67.5的第三个时期。从2020年开始，这些新观察结果是，进行适当运动测量的基线已经增长到20年（从2000年最早的Chandra观察结果）。我们在这里报告这些新扩展测量结果的结果。附近的明亮点源缺乏使绝对图像对齐困难。但是，我们能够测量沿多个投影方向的残留直径的平均膨胀。我们发现残留物的平均速度为6120（4900-7360）km S $^{ - 1} $。这种高冲击速度与以前的作品一致，并且与0509-67.5的推论相一致，即0509-67.5扩展到周围非常低的密度。在LMC的距离处，该速度对应于未确定的600岁的年龄，实际年龄较小。
We present a third epoch of Chandra observations of the Type Ia Large Magellanic Cloud Supernova remnant (SNR) 0509-67.5. With these new observations from 2020, the baseline for proper motion measurements of the expansion has grown to 20 years (from the earliest Chandra observations in 2000). We report here the results of these new expansion measurements. The lack of nearby bright point sources renders absolute image alignment difficult. However, we are able to measure the average expansion of the diameter of the remnant along several projection directions. We find that the remnant is expanding with an average velocity of 6120 (4900 -- 7360) km s$^{-1}$. This high shock velocity is consistent with previous works, and also consistent with the inference that 0509-67.5 is expanding into a very low density surrounding medium. At the distance of the LMC, this velocity corresponds to an undecelerated age of 600 yrs, with the real age somewhat smaller.
