What happens to the core of a high-mass star after it runs out of hydrogen?

What happens to the core of a high-mass star after it runs out of hydrogen? It shrinks and heats up. What happens when a main-sequence star exhausts its core hydrogen fuel supply? The core shrinks while the rest of the star expands.

What happens after the helium flash in the core of a star?

After the helium flash, the star is fusing helium into carbon in the core with a shell of hydrogen fusing in helium around the core.

What happens when the gravity of a massive star is able to overcome neutron degeneracy pressure?

What happens when the gravity of a massive star is able to overcome neutron degeneracy pressure? The star explodes violently, leaving nothing behind. The core contracts and becomes a white dwarf.

When the core of a star reaches a temperature of about 100 million degrees K something new happens in the core What is this new event?

When the temperature in the core reaches about 100 million degrees, the helium will begin to fuse into carbon by a reaction known as the triple-alpha process, because it converts three helium nuclei into one carbon atom. This generates a great deal of heat.

What effects will the efficient fusion and high core temperatures have on high-mass stars?

What effects will the efficient fusion and high core temperatures have on high-mass stars? They will burn through their hydrogen more quickly, owing to both the efficiency of the CNO cycle and the higher core temperature.

What will happen if a low massive main sequence star runs out of hydrogen fuel answer?

Recall that these stages for low mass stars are: hydrogen burning in the core while on the Main Sequence. as the hydrogen fuel runs out, extreme pressure raises the temperature to 100 million degrees, where helium burning becomes possible.

Which stars are likely to undergo a helium flash when helium burning in their core turns on?

A helium flash is a very brief thermal runaway nuclear fusion of large quantities of helium into carbon through the triple-alpha process in the core of low mass stars (between 0.8 solar masses ( M ☉) and 2.0 M ☉) during their red giant phase (the Sun is predicted to experience a flash 1.2 billion years after it leaves …

What causes the helium flash Why does a helium flash make understanding the later stages of stellar evolution more difficult?

Why does a helium flash make understanding the later stages of stellar evolution more difficult? This uncertainty during a helium flash means that there is an uncertainty in the structure of the star at the end of the helium flash, which makes the rest of the models uncertain.

What happens when the gravity of a massive star’s collapsing core?

If the core is larger, it will collapse into a black hole. To turn into a neutron star, a star must start with about 7 to 20 times the mass of the Sun before the supernova. Only stars with more than 20 times the mass of the Sun will become black holes.

What happens when the gravity of a massive stars collapsing core is able to overcome neutron degeneracy pressure quizlet?

E) As gravity overwhelms the electron degeneracy pressure, it will explode as a supernova. It will cool down and become a cold black dwarf.

What happens when the core of a star reaches a temperature of about 100 million K quizlet?

When core temperature reaches 100 million Kelvin, Helium fusion begins. Helium fusion requires higher temperatures than Hydrogen fusion b/c larger charge (two protons in each nucleus) leads to greater repulsion.

What would happen if the temperature of the sun’s core increased suddenly?

what would happen if the temperature of the sun’s core increased suddenly? c) the rate of fusion would increase causing the core to expand and cool back to its original temperature. how long does it take for energy produced in the sun’s core to reach the photosphere?