APOD 20091127 The Jets of NGC 1097

sagalliant

来源：APOD

Enigmatic spiral galaxy NGC 1097 lies about 45 million light-years away in the southern constellation Fornax. The small companion galaxy, just below and left of center, that seems to be wrapped in its spiral arms, is not NGC 1097's most peculiar feature though. Instead, This very deep exposure shows hints of faint, mysterious jets, most easily seen to extend well beyond the bright arms toward the lower right. In fact, four faint jets are ultimately recognized in optical images of NGC 1097. The jets trace an X centered on the galaxy's nucleus, but could be fossil trails left over from the capture of a much smaller galaxy in the large spiral's ancient past. A Seyfert galaxy, NGC 1097's nucleus also harbors a massive black hole.

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skyczheng

期待翻译后！

gohomeman1

这是北京天文馆的翻译，我没校对过内容，但基本意思应该到了 http://www.bjp.org.cn/apod/today.htm

NGC1097的喷流
影像提供及版权：Robert Gendler

                               
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说明：
神秘莫测的旋涡星系NGC1097距离我们大约4,500万光年远，位于南方的天炉座内。有一个伴星系出现在影像中央的左下方，看上去它好像被包裹在星系的旋臂中一样，但这还不是NGC1097最特殊的特征。反而，在这张深空曝光影像里显示了昏暗而又神秘喷流的线索，很容易从影像中看到从明亮的旋臂向右下方喷出。事实上，在这张NGC1097光学影像中可以辨认出4道喷流。喷流痕迹以星系核为中心呈现出一个X字样，但也可能是这个巨大旋涡星系在过去捕捉到一个较小的星系的陈旧痕迹。作为一个塞弗特星系，NGC1097星系核附近也拥有一个大质量黑洞。

gohomeman1

很有必要把小图贴出来，否则大家可能看不清文章中所言的“X”喷流。

                               
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