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DEM L316 (Supernova Remnant)


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DEM L316
Supernova Remnant (超新星残骸)
SNR

別名 (Other names)
WCD97 Shell A, WCD97 Shell B, DEM L 316

星座 (Constellation)

かじき座 (Dor) (Dorado)


距離 (Distance)
160,000光年 (160,000 light-years)

DEM L316 is a supernova remnant located 160,000 light years from the Earth in the constellation Dorado.

DEM L316 (Supernova Remnant) : Picture

DEM L316 (Supernova Remnant)
DEM L316 (Supernova Remnant)
(C) NASA/CXC/U.Illinois/R.Williams & Y.-H.Chu
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 with Scale Bar Optical Image of DEM L316
DEM L316 with Scale Bar
(C) NASA
Optical Image of DEM L316
(C) NOAO/CTIO/U.Illinois/R.Williams & MCELS coll.
X-ray of DEM L316 Radio of DEM L316
X-ray of DEM L316
(C) NASA
Radio of DEM L316
(C) NASA
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DEM L316 (Supernova Remnant) : Movie

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