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・ Pair Dadeni
・ Pair distribution function
・ Pair gain
・ Pair Of Dice Paradise
・ Pair of Kings
・ Pair of pants (mathematics)
・ Pair of spaces
・ Pair potential
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・ Pair programming
・ Pair skating
・ Pair testing
・ Pair trawling
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・ Pair-et-Grandrupt
Pair-instability supernova
・ Pair-rule gene
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・ Paired data
・ Paired difference test
・ Paired disparity code
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Pair-instability supernova : ウィキペディア英語版
Pair-instability supernova

A pair-instability supernova occurs when pair production, the production of free electrons and positrons in the collision between atomic nuclei and energetic gamma rays, reduces thermal pressure inside a supermassive star's core. This pressure drop leads to a partial collapse, then greatly accelerated burning in a runaway thermonuclear explosion which blows the star completely apart without leaving a black hole remnant behind. Pair-instability supernovae can only happen in stars with a mass range from around 130 to 250 solar masses and low to moderate metallicity (low abundance of elements other than hydrogen and helium, a situation common in Population III stars). The recently observed objects SN 2006gy, SN 2007bi, SN 2213-1745 and SN 1000+0216 are hypothesized to have been pair-instability supernovae.
==Physics==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Pair-instability supernova」の詳細全文を読む



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