sun and supernovae

How does the sun generate energy?

nuclear fusion - the proton proton chain

conversion of hydrogen into helium releases energy

how is energy transported in the sun?

heat form the core transported through radiation and convection processes

how is the sun s equilibrium maintained?

gravitational forces balance with internal pressure

what will happen to our sun once it exhausts H fuel?

enter red giant phase expanding and cooling

helium fusion → carbon and oxygen

planetary nebulae form

What are supernovae?

extremely bright flare ups of stars → very rare

emit large amounts of energy

What does a type 1 supernova look like?

4billx luminosity of our sun fade slowly over a few hundreds of days

how does a type 1 supernovae form?

likely when a white dwarf in a binary system accretes mass from a companion star → exceeding chandraskhar limit

what is burning in a type 1 supernova?

weak H line sin spectra indicate burning of most of the H in the white dwarf

how are T1 supernovas used?

in cosmological expansion measurements due to their consistent intrinsic brightness

what do T2 supernova look like

0.6billion times the luminosity of a T1

fade irreguarly and contain H line son spectrum

how are T2 supernova formed?

result from explosive end of a massive stars lives leading to core collapse and ejection of layers