THE PHYSICS BEHIND INTERSTELLAR FIREWORKS
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THE PHYSICS BEHIND INTERSTELLAR
FIREWORKS
Outline
Stellar evolution
Supernovae
Types of supernovae
Mechanisms of supernovae
Supernova detection
Importance of supernovae
Stellar evolution
The
changing of
stars with
time
What is a
supernova? • One of the most powerful and
spectacular events in the universe.
• A bright explosion
• Marks the death of a star
• Releases a large amount of energy (about 1044 J)
• Shines with high luminosity (sometimes equivalent to the brightness of about 10 billion suns)
Types of
supernovae
Supernovae
Type I Type II
Mechanisms of
supernovae
White dwarf supernovae – Type Ia
the accretion of mass from the partner in
a binary star system
Mechanisms of
supernovae …
Massive star supernovae
Type II, Type Ib, Type Ic
core collapse
Core collapse
Undergoes an extended sequence
of thermonuclear reactions
Supernova
detectionAt first the supernovae were observed with
naked eyes.
For this the luminosity of the supernova
should be high.
With the invention of telescopes it became
possible to observe supernovae
»In other galaxies
»With less luminosities
Major types of telescopes
used
Optical
telescope
X-ray
telescope
Radio
telescope
Importance of
supernovaeDistance measurements
Evidence for accelerating
expansion of the universe
Distribution of elements
Stimulating nebulae for star
formation
Summary
Stellar evolution
Supernovae
Types of supernovae
Mechanisms of supernovae
Supernova detection
Importance of supernovae
Thank you !
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