Journey of a Star: Stellar Evolution Explained
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Deekshitha U G
Assistant Professor
Dept.of Physics
Proto star
•
Birth place of star is Nebula
•
Hydrogen is so dense that it begins to
contract
•
Temperature of the gas will rise
•
Gas present in the protostar exert a pressure
outward
Red giant
•
The shell of burning hydrogen
heats up the envelope of the star
which increase the outward
pressure which expands the
envelope
White dwarf
Gravitational collapse of the core and star
begin to shrink rapidly
The star becomes extremely hot and dense
and attains very small size
Black dwarf
:
White dwarf energy will continuously
radiated
Temperature begin to decrease and
ultimately it turns into a dark entity of the
space
Chandrashekhar limit
If the mass of a white dwarf is greater
than 1.41 solar mass, then there will be
the possibility of further stages of
evolution
Thank you
Explore the stages of stellar evolution, from the birth of a protostar in a nebula to the dramatic transformations leading to the formation of red giants, white dwarfs, and black dwarfs. Understand phenomena like gravitational collapse, temperature changes, radiative processes, and the Chandrasekhar limit that shapes the life cycle of stars. Experience the awe-inspiring cosmic journey through detailed descriptions and captivating images.
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Presentation Transcript
STELLAR EVOLUTION Deekshitha U G Assistant Professor Dept.of Physics
Proto star Birth place of star is Nebula Hydrogen is so dense that it begins to contract Temperature of the gas will rise Gas present in the protostar exert a pressure outward
Red giant The shell of burning hydrogen heats up the envelope of the star which increase the outward pressure which expands the envelope
White dwarf Gravitational collapse of the core and star begin to shrink rapidly The star becomes extremely hot and dense and attains very small size
Black dwarf: White dwarf energy will continuously radiated Temperature begin to decrease and ultimately it turns into a dark entity of the space
Chandrashekhar limit If the mass of a white dwarf is greater than 1.41 solar mass, then there will be the possibility of further stages of evolution
