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【美图共赏2009-06-12】可疑的超新星遗迹

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发表于 2009-6-12 18:50 | 显示全部楼层 |阅读模式
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2009 June 12



SNR 0104: An Unusual Suspect
Credit: X-ray: NASA / CXC / Penn State / S.Park & J.Lee; Infrared: NASA / JPL-Caltech

Explanation: SNR 0104 is a supernova remnant with an unusual shape. Found 190,000 light-years away in our neighboring galaxy the Small Magellanic Cloud, SNR 0104 is suspected of being the expanding debris cloud from a Type 1a supernova - the catastrophic thermonuclear explosion of a white dwarf star. For example, like Type 1a supernova remnants within our galaxy, investigations show that it contains large amounts of iron. But unlike other Type 1a remnants, including the well-studied Tycho, Kepler, and SN 1006, SNR 0104 is definitely not spherical. In fact, the remnant's shape suggests this supernova explosion was very asymmetric and produced strong jets. This intriguing composite image combines Chandra Observatory x-ray data of the remnant, shown in purple hues, with Spitzer Space Telescope infrared data covering the wider region, mapped to red and green colors. It indicates that the supernova explosion took place in the complicated and dense environment of a star-forming region. So, an alternative explanation is that the expanding debris cloud is sweeping up clumpy interstellar material, accounting for the odd shape of SNR 0104. The broad, multiwavelength view spans about 1,800 light-years at the estimated distance of SNR 0104.
 楼主| 发表于 2009-6-12 18:51 | 显示全部楼层
可疑的超新星遗迹
版权: X-ray: NASA / CXC / Penn State / S.Park & J.Lee; Infrared: NASA / JPL-Caltech

说明:SNR 0104是一个形状怪异的超新星遗迹,它位于邻近星系小麦哲伦云中,距离我们190,000光年。我们怀疑SNR 0104是一颗1a型超新星产生的正在膨胀的残骸云。这类超新星是白矮星发生灾难性热核爆炸的结果。研究显示,这个遗迹中含有大量的铁,与我们银河系中的1a型超新星遗迹相似。但是,其他1a型超新星,包括充分研究过的第谷超新星、开普勒超新星以及超新星1006的遗迹都是球形的,SNR 0104却显然不是球体。实际上,这个跡的形状暗示,这颗超新星爆发时极不对称,产生了强烈的喷流。这幅有趣的图片是由钱德拉天文台得到的X射线数据与斯皮策空间望远镜拍摄的红外数据叠加而成的,前者在图中标为紫色,后者覆盖的天区范围更广,显示为红色和绿色。这幅图片表明,这个超新星爆发是在恒星形成区内部繁杂密集的环境当中发生的。因此,另一个解释就是,膨胀着的残骸云正在清扫成块的星际物质,从而塑造了SNR 0104那奇特的外形。在SNR 0104的估计距离上,这幅多波长大视场图片的视野横跨大约1,800光年。 (译/小月)

[ 本帖最后由 月下美丽的梦 于 2009-6-12 19:58 编辑 ]
发表于 2009-6-14 23:22 | 显示全部楼层
红色的X
 楼主| 发表于 2009-6-17 20:55 | 显示全部楼层
原帖由 星海逻盘 于 2009-6-14 23:22 发表
红色的X


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