N49（未译）

                               
登录/注册后可看大图

This beautiful composite image shows N49, the aftermath of a supernova explosion in the Large Magellanic Cloud. A new long observation from NASA's Chandra X-ray Observatory, shown in blue, reveals evidence for a bullet-shaped object being blown out of a debris field left over from an exploded star.

In order to detect this bullet, a team of researchers led by Sangwook Park of Penn State University used Chandra to observe N49 for over 30 hours. This bullet can be seen in the bottom right hand corner of the image (roll your mouse over the image above or click here) and is rich in silicon, sulphur and neon. The detection of this bullet shows that the explosion that destroyed the star was highly asymmetric.

The bullet is traveling at a high speed of about 5 million miles an hour away from a bright point source in the upper left part of N49. This bright source may be a so-called soft gamma ray repeater (SGR), a source that emits bursts of gamma rays and X-rays. A leading explanation for these objects is that they are neutron stars with extremely powerful magnetic fields. Since neutron stars are often created in supernova explosions, an association between SGRs and supernova remnants is not unexpected. This case is strengthened by the apparent alignment between the bullet's path and the bright X-ray source. However, the new Chandra data also shows that the bright source is more obscured by gas than expected if it really lies inside the supernova remnant. In other words, it is possible that the bright X-ray source actually lies beyond the remnant and is projected along the line of sight. Another possible bullet is located on the opposite side of the remnant, but it is harder to see in the image because it overlaps with the bright emission - described below - from the shock-cloud interaction.

Optical data from the Hubble Space Telescope (yellow and purple) shows bright filaments where the shock wave generated by the supernova is interacting with the densest regions in nearby clouds of cool, molecular gas.

Using the new Chandra data, the age of N49 -- as it appears in the image -- is thought to be about 5,000 years and the energy of the explosion is estimated to be about twice that of an average supernova. These preliminary results suggest that the original explosion was caused by the collapse of a massive star.



空了再译吧。。。


转自钱德拉

照片不错 就是文章看不懂

看不懂的飞过、、、、

英语差。

真漂亮~~~文章半懂~~~

用我那半懂的英文给大家翻译一下吧，如有错误，尽请拍砖

    这幅美丽的合成的图片，向我们展示了N49，大麦哲伦星云中一个超新星爆发后的景象，在钱德拉X射线天文台的一项新的长期的观测中，图片中蓝色的部分，展示了从爆发的恒星碎片区域中吹出的子弹状的物质。
为了探测些子弹状的物质，由宾州大学Sangwook Park领导的研究团队利用钱德拉X射线天文台对N49进行了超过30个小时的观测。在图像的右下角（移动鼠标到图片上方或点击此处）我们可以看到这些物质中富含硅、硫和氖。探测表明在爆发中被摧毁的恒星呈现出高度的不对称。
    这些子弹状物质以每小时500万英里的速度高速远离N49左上部分的亮点源。这个亮点源可能就是所谓的软GAMMA射线再生源（SGR)，一个爆发出GAMMA射线和X射线的源。对此比较主流的解释这是一个具有很强磁场的中子星。由于中子星常常是在超新星爆发中形成，SGRs和超新星之间有联系并不意外。这个联系通过明显的弹状路径和明亮的X射线源得到了巩固。不过，钱德拉的新数据也表明，气体使这个发光源变得比预期的模糊，如果它真的在超新星残骸中。换句话说，有可能这个发光X射线源远离残骸，只是沿着视线上的投影。另一种可能弹状物质位于残骸的对面，但是在图片上很难看出来，因为它和来自冲击云的亮发射相互重叠。
    来自哈勃空间望远镜的光学数据（黄色和紫色）表明，由超新星冲击波产生的明亮丝状物和附近较冷的云的密集区域相互作用，分子气体。
    利用新的钱德拉的数据，N49的年龄-图片所显示的，被认为大约5000年，并且这次爆发的能量是超新星爆发均值的两倍。这些初步的结论显示最初的爆发是由一个大质量的恒星坍塌造成的。

先祝贺一下。然后建议：
措辞还可以再修饰一下。以我们喜欢的方式去写，比严格对应英文的顺序更重要。