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

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

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 to the helium rich core of a star after the core runs out of hydrogen?

What happens to the helium-rich core of a star after the core runs out of hydrogen? It contracts and heats.

What happens during a helium flash?

Helium Flash signals the start of helium fusion in the core. Helium core fusion producing energy and the byproducts of carbon and oxygen begins. There is also a thin layer of hydrogen shell burning around the helium core, though this isn’t producing as much energy as the helium fusion.

What happens when helium gets used up in the core of a low mass star?

as the helium in the core is exhausted, the star begins helium burning in a shell around an inert carbon core while moving again up the H-R diagram to become a Red Supergiant.

What happens in the core of a star fusing helium into carbon after all the helium is used up in the reaction?

Eventually all the helium in the core has fused into carbon and oxygen and so the core contracts again. Carbon and oxygen nuclei have more protons in them than helium does so the coulombic repulsion is greater.

What process happens in the core of a star?

The core of a star is located inside the star in a region where the temperature and pressures are sufficient to ignite nuclear fusion, converting atoms of hydrogen into helium, and releasing a tremendous amount of heat. The size of the core depends on the mass of the star.

What happens to the core and the shell Once helium is being burned?

The core left behind becomes a white dwarf. Double-shell burning ends with a pulse that ejects the H and He into space as a planetary nebula. The core left behind becomes a white dwarf. Double-shell burning ends with a pulse that ejects the H and He into space as a planetary nebula.

What happens when the majority of the helium in the core has been converted?

When the majority of the helium in the core has been converted to carbon, then the rate of fusion decreases. Gravity again squeezes the star. In a low-mass star (with mass less than twice the Sun’s mass), there is not enough mass for a carbon fusion to occur.

What happens to the helium that is produced in the core of the Sun?

The Sun will expand to a red giant which fuses helium to carbon and oxygen in its core by the Triple Alpha Process. After the helium in its core is used up, the Sun will shed its atmosphere and in the process create a Planetary Nebulae.

Why do stars shrink after helium flash?

During the helium flash, a star’s degenerate core is heated so intensely that it finally “vaporizes”, so to speak. That is, individual nuclei begin moving so fast that they can “boil away” and escape it. The core reverts back into a (spectacularly dense) normal gas, and powerfully expands.

Does a helium flash destroy a star?

The Helium Flash itself is quite an event, but within the star – basically the core explodes as helium-burning begins, heaving the core onto the Helium Main Sequence. That heaving against the immense gravity of the core uses up most of the energy of the explosion, thus not a lot gets through to the surface.

What happens to a low mass star after helium flash?

What happens to a low-mass star after helium flash? Its luminosity goes down.

What causes the helium flash in the cores of solar mass stars?

The point on the Hertzsprung-Russell diagram where the helium flash occurs. The helium flash is the onset of runaway helium burning in the core of a low-mass star (such as the Sun). The helium flash happens in the hydrogen-exhausted core of a star that has become a red giant.

What star phase happens when it consumes all the layers of helium in its core and runs out of other elements to use as fuel?

White Dwarf Stars A star turns into a white dwarf when it consumes all the layers of helium in its core and runs out of other elements to use as fuel. When the outward light pressure from the fusion reaction stops, the star collapses inward from its own gravity.

What happens to a low mass star after the helium flash quizlet?

What happens to a low-mass star after helium flash? Its luminosity goes down.

What happens to the luminosity of a low mass star after helium flash?

After the flash, the helium burning reactions occur in a hot ideal gas, and the reactions occur at a slow, stable rate. (Difference between a nuclear reactor and a bomb.) After the flash, the luminosity decreases, and the outer layers of the star shrink.

What is the helium flash and what causes it?

What is the helium flash and what causes it? the explosive ignition of helium fusion in the core of a giant star. It is caused by the ignition of helium fusion in the star’s core.

What happens to the core of a star when it dies?

When the helium fuel runs out, the core will expand and cool. The upper layers will expand and eject material that will collect around the dying star to form a planetary nebula. Finally, the core will cool into a white dwarf and then eventually into a black dwarf. This entire process will take a few billion years.