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Type II supernova-
Type II supernova-
Type II supernova-
Type II supernova-
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A Type II supernova or SNII results from the rapid collapse and violent
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A Type II supernova or SNII results from the rapid collapse and violent t
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explosion of a massive star. A star must have at least eight times, but no
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explosion of a massive star. A star must have at least eight times, but no
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more than 40 to 50 times, the mass of the Sun to undergo this type of f
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more than 40 to 50 times, the mass of the Sun to undergo this type of
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explosion. Type II supernovae are distinguished from other types of f
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explosion. Type II supernovae are distinguished from other types of
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supernovae by the presence of hydrogen in their spectra. They are usually
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supernovae by the presence of hydrogen in their spectra. They are usually
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observed in the spiral arms of galaxies and in H II regions, but not in
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observed in the spiral arms of galaxies and in H II regions, but not in
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elliptical galaxies; those are generally composed of older, low-mass stars,
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elliptical galaxies; those are generally composed of older, low-mass stars, ,
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with few of the young, very massive stars necessary to cause a supernova. .
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with few of the young, very massive stars necessary to cause a supernova.
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Cause--
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Gravity gives the supernova its energy. For Type II supernovae, mass
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Gravity gives the supernova its energy. For Type II supernovae, mass
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flows into the core by the continued formation of iron from nuclear fusion.
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flows into the core by the continued formation of iron from nuclear fusion.
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Once the core has gained so much mass that it cannot withstand its own
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Once the core has gained so much mass that it cannot withstand its own
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weight, the core implodes
weight, the core implodes
w e i g h t , t h e c o r e i m p l o d e s
Image- Type II supernova
Image- Type II supernova
Image- Type II supernova
Image- Type II supernova
