标题： 钱德拉对SNR 1987A的观测 显示英文标题

标题： Chandra Observations of SNR 1987A

摘要： 我们报告了利用{\it 质子X射线天文台}对1987A超新星遗迹的X射线监测计划的结果。我们在{\it 查德雷}第三周期间进行了两次新的观测，使过去三年内的监测次数增加到六次。这六次观测提供了该新生超新星遗迹在X射线波段的详细时间历史记录。高角分辨率图像表明，软X射线亮斑与光学亮点相关联，而硬X射线特征则与无线电图像有更好的相关性。我们用一种模型来解释这一现象，即快速冲击波穿过周围的恒星HII区域产生硬X射线和无线电发射，而软X射线和光学发射则来自进入周围内环稠密结点的慢速冲击波。新的观测开始显示出形态上的变化，这可能预示着这个萌芽中的超新星遗迹进入了一个新的发展阶段。在过去30个月里，观测到的X射线通量几乎增加了三倍。X射线遗迹以大约$\sim$5000 km/s$^{-1}$的速度膨胀。 显示英文摘要

摘要： We report on the results of our monitoring program of the X-ray remnant of supernova 1987A with the {\it Chandra X-Ray Observatory}. We have performed two new observations during the {\it Chandra} Cycle 3 period, bringing the total to six monitoring observations over the past three years. These six observations provide a detailed time history of the birth of a new supernova remnant in X-rays. The high angular resolution images indicate that soft X-ray bright knots are associated with the optical spots, while hard X-ray features are better correlated with radio images. We interpret this in terms of a model in which fast shocks propagating through the circumstellar HII region produce the hard X-ray and radio emission, while the soft X-ray and optical emission arise in slower shocks entering into dense knots in the circumstellar inner ring. New observations begin to show changes in the morphology that may herald a new stage in the development of this incipient supernova remnant. The observed X-ray fluxes increase by nearly a factor of three over the last 30 months. The X-ray remnant is expanding at a velocity of $\sim$5000 km s$^{-1}$.