ASTA02H3 Lecture Notes - Ideal Gas Law, White Dwarf, Planetary Nebula
Document Summary
Life of a star after the main sequence stage. A thin shell burns is added to the (mass of) the core. Once the core is depleted of helium. Soon, a burning shell will form immediately around the core. The upper hydrogen shell burning deposits helium in a layer between the two shells. It moves along an evolutionary track called the asymptotic giant branch (agb) asymptotic giant branch. The core is inert in the case of agb stars. What is the consequence of this? lack of energy results in gravitational contraction. How does this eventually change the structure of the core? the carbon and oxygen core becomes degenerate from halting gravity. Not all electrons can go to ground state. Not enough space from contraction for all electrons. No two electrons can be in the same energy level. Solar wind blasts away layers of agb. Photons produce many uv travel to the surface and ionize.
