Page 28 - COSMOS & H -Health - Science

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What are the different types of
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What are the different types of
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S S u p e r n o v a ?
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Supernova?
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Supernova?
Supernovae may be divided into two broad classes, Type I
Supernovae may be divided into two broad classes, Type
Supernovae may be divided into two broad classes, Type I ISupernovae may be divided into two broad classes, Type I
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and Type II, according to the way in which they detonate.
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and Type II, according to the way in which they detonate.
a a n d T y p e I I I I , , a c c o r d i i n g t t o t t h e w a y i i n w h i i c h t t h e y d e t t o n a t t e . .
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Type I supernovae may be up to three times brighter than
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Type I supernovae may be up to three times brighter than
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Type II; they also differ from Type II supernovae in that their
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Type II; they also differ from Type II supernovae in that their
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spectra contain no hydrogen lines and they expand about

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twice as rapidly.
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Type I supernova-
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It is a type of supernova that occurs in binary
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I I It is a type of supernova that occurs in binary
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systems (two stars orbiting one another) in which
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one of the stars is a white dwarf. The other star
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one of the stars is a white dwarf. The other star
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can be anything from a giant star to an even
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can be anything from a giant star to an even
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smaller white dwarf. The Type Ia category of
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supernova produces a fairly consistent peak
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luminosity because of the fixed critical mass at
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as standard candles to measure the distance to
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their host galaxies: the visual magnitude of a type
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Ia supernova, as observed from Earth, indicates its
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I I Ia supernova, as observed from Earth, indicates its
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d d i i s t t a n c e f f r o m E a r t t h . .
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distance from Earth.
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Image 2- White Dwarf
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