Supernova - Part 3
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Supernova - Part 3



This presentation is about Supernova Expansion and Explosion

This presentation is about Supernova Expansion and Explosion



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Supernova - Part 3 Presentation Transcript

  • 1. Supernova R. Sri Madhavi
  • 2. What is Supernova?
    • Supernova is a celestial body
    • Supernova is actually a stellar explosion
    • The term, “Supernova” was coined in 1926 by a Swedish astrophysicist, Fritz Zwicky
  • 3. What is the meaning of Supernova?
    • A very bright new star shining in the celestial sphere
  • 4. How often does a Supernova occur?
    • About once in 50 years
    • It happens in the galaxy
    • Its size is about the size of the milky way
  • 5. What is the importance of Supernova?
    • Supernova plays a significant role in enriching the interstellar medium with higher mass elements
    • the expanding shock waves from supernova explosions can trigger the formation of new stars
  • 6. Types of Supernova
    • There are two common types of Supernova:
    • Ia
    • II
  • 7. Type Ia Supernova
    • This supernova is the result of the activity of a couple of stars; one of which is a type of star known as “White Dwarf”
    • White dwarf is a star rich in carbon and oxygen.
  • 8. Type Ia Supernova
    • The “White Dwarf” absorbs matter from the companion and therefore its mass increases,
    • When the density of the core of the White Dwarf reaches a critical density of 2 x 10 9 g/cm 3
    • carbon and oxygen undergo fusion uncontrollably, and therefore the star explodes
  • 9. Type II Supernova
    • This occurs in a star which is in the verge of death
    • At this point of time, there is no fuel in the star to burn, and there is so much accumulation of iron inside the star.
    • Due to the weight of iron, the star fragments and collapses
  • 10. Mechanism of Supernova Ia
  • 11. Mechanism of supernova: Onion Layers
  • 12. Mechanism of Supernova
  • 13. Other Types
    • Other types of Supernova are:
    • Ib
    • Ic
    • IIP IIL
  • 14. What happens when Supernova occurs? - 1
    • A supernova can radiate as much energy as the Sun could emit over its life span.
  • 15. What happens when Supernova occurs? -2
    • The explosion expels star's material at a velocity of up to 30,000 km/s (a tenth the speed of light )
  • 16. What happens when Supernova occurs? -3
    • The material coming out of a Supernova produces a shock wave into the surrounding interstellar medium .
    • This shock wave sweeps up an expanding shell of gas and dust called a supernova remnant .