DEM L316 :两个超新星爆炸遗骸

来源:每日一天文圖 (成大物理分站) http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/apod.html


两个超新星爆炸遗骸DEM L316

影像提供与版权: Gemini Observatory, GMOS-South, NSF

      说明:这两个超新星爆炸遗骸彼此之间有关吗？为了解答这个疑惑，位于智利高山上的八米双子座望远镜指向了这个奇特，巨大，拥有双瓣的DEM L316。观测的结果就是上面这张高解析度的影像。仔细地检查影像，以及由钱卓拉X射线太空望远镜记录的资料，比较这两个超新星爆炸遗骸有何差异。奇特的是，较小的那个球壳似乎是一个Ia型超新星爆炸，也就是由白矮星爆炸而形成的；而较大的球壳则是II型超新星爆炸，也就是由大质量恒星爆炸而形成的。既然这两种星体的演化时间相差甚大，因此它们应该不是同时形成，也就是说，它们彼此之间没有关联。此外，并没有任何证据显示这两个球壳正在碰撞，它们只是碰巧在我们的视线方向重叠。 DEM L316位于大麦哲伦星系，距离大约是160000光年远，大小约140光年，从地球上看去，它在南天的剑鱼座里。

[ 本帖最后由 寻找拉玛 于 2008-1-15 12:23 编辑 ]

好巨大的泡泡啊!

来源:http://chandra.harvard.edu/photo/2005/d316/more.html#d316_xray

Chandra X-ray Image of DEM L316


Chandra X-ray data reveal a cat-shaped image produced by the remnants of two exploded stars in the Large Magellanic Cloud galaxy about 160,000 light years from Earth. Although the shells of hot gas appear to be colliding, this may be an illusion. Chandra spectra show that the shell of hot gas on the upper left contains considerably more iron than the one on the lower right. This implies that stars with very different ages exploded to produce these objects. The remnant on the upper left is from an old white dwarf star in a binary system, and the one on the lower right is from a much younger massive star, so the apparent proximity of the remnants is probably the result of a chance alignment. In this image, the colors represent different ranges of X-rays, with red, green, and blue representing low, medium, and higher X-ray energies.
Scale: Image is 5.7 arcmin across


超新星遗迹 DEM L316 的X光图像


[ 本帖最后由 寻找拉玛 于 2008-1-15 12:57 编辑 ]

来源:http://chandra.harvard.edu/photo/2005/d316/more.html#d316_xray

Optical Image of DEM L316


This optical image of DEM L316, two supernova remnants in the Large Magellanic Cloud galaxy, was taken with the Curtis-Schmidt telescope at Cerro Tololo Inter-American Observatory (CTIO). The field of view is the same as the Chandra image above.
Scale: Image is 5.7 arcmin across


DEM L316的光学图像

[ 本帖最后由 寻找拉玛 于 2008-1-15 12:57 编辑 ]

来源:http://chandra.harvard.edu/photo/2005/d316/more.html#d316_xray

X-ray, Optical & Radio Composite of DEM L316


This composite image of DEM L316 combines data from Chandra (X-ray, blue), the Curtis-Schmidt telescope at CTIO (optical, red) & ATCA, the Australia Telescope Compact Array (radio, green).
Scale: Image is 6.4 arcmin across



DEM L316 X-射线，光学和无线电综合图像,其中X-射线为蓝色,光学为红色,无线电为绿色.

[ 本帖最后由 寻找拉玛 于 2008-1-15 12:57 编辑 ]

来源:http://chandra.harvard.edu/photo/2005/d316/more.html#d316_xray



DEM L316的无线电图像

[ 本帖最后由 寻找拉玛 于 2008-1-15 12:56 编辑 ]

今天成大速度非常快啊。。。

来源:http://chandra.harvard.edu/photo/2005/d316/more.html#d316_xray

DEM L316: Supernova Remnants Deconstructed

This composite X-ray (red and green)/optical (blue) image reveals a cat-shaped image produced by the remnants of two exploded stars in the Large Magellanic Cloud galaxy. Although the shells of hot gas appear to be colliding, this may be an illusion.


Chandra X-ray spectra show that the hot gas shell on the upper left contains considerably more iron than the one on the lower right. The high abundance of iron implies that this supernova remnant is the product of a Type Ia supernova triggered by the infall of matter from a companion star onto a white dwarf star.



In contrast, the much lower abundance of iron in the lower supernova remnant indicates that it was a Type II supernova produced by the explosion of a young, massive star. It takes billions of years to form a white dwarf star, whereas a massive young star will explode in a few million years. The disparity of ages in the progenitor stars means that it is very unlikely that they exploded very close to each other. The apparent proximity of the remnants is probably the result of a chance alignment.


    DEM L316 的红色和绿色复合X光图像。

                               
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[ 本帖最后由 寻找拉玛 于 2008-1-15 12:46 编辑 ]

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