What happen to the core of high-mass after it runs out of hydrogen?

What happen to the core of high-mass after it runs out of hydrogen?

Eventually the core of the star runs out of hydrogen. When that happens, the star can no longer hold up against gravity. Its inner layers start to collapse, which squishes the core, increasing the pressure and temperature in the core of the star. At this point the star is called a red giant.

What happens in the core of the star when it runs out of hydrogen fuel low mass?

when the hydrogen in the core is exhausted, the star begins hydrogen burning in a shell around the degenerate helium core while moving up the Red Giant Branch. as the hydrogen fuel runs out, extreme pressure raises the temperature to 100 million degrees, where helium burning becomes possible.

What happens when a Stars core runs out of hydrogen and why does this occur?

When the hydrogen supply in the core begins to run out, and the star is no longer generating heat by nuclear fusion, the core becomes unstable and contracts. The outer shell of the star, which is still mostly hydrogen, starts to expand. As it expands, it cools and glows red.

What happens to a high-mass star when it stops fusing hydrogen?

When hydrogen fusion can no longer happen in the core, gravity begins to collapse the core again. The star’s outer layers expand while the core is shrinking and as the expansion continues, the luminosity begins to increase. After about 100 million years, the star fuses all its core helium into carbon.

What happens to the core of a star after a planetary nebula is ejected?

What happens to the core of a star after it ejects a planetary nebula? It becomes a white dwarf.

Why does the core of a star collapse after fusion has stopped?

Why does the core collapse once fusion stops? The pressure in the core can no longer support the weight of the overlying layers. When the core collapses, a hydrogen-burning shell forms. Fusion begins here because this shell heats up as the core collapses.

What is the life cycle for a high mass star?

High-mass stars have lives of 10 million years, versus 10 to 50 billion years or more for low-mass stars. At the end of a high-mass star’s fusion process, iron composes the star’s core. No nuclear fusion of iron is possible out of a high-mass star core, which has the same mass as our entire Sun.

Why do high mass stars burn faster?

More massive stars have more weight pushing down on the core and higher temperatures in the core. This means more high energy hydrogen atoms having more collisions. Thus, fusion takes place more rapidly in larger stars and the fuel is used faster.

What happens to a massive supergiant star when fusion ceases in its core?

Once the fusion stops, gravity takes the lead and compresses the star smaller and tighter. Temperatures increase with the contraction, eventually reaching levels where helium is able to fuse into carbon. Depending on the mass of the star, the helium burning might be gradual or might begin with an explosive flash.

What 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. It’s within this region that temperatures reach 15,000,000 Kelvin and nuclear fusion can take place.

What happens to the core of a star after it ejects a planetary nebula quizlet?

What is the star left at the core of a planetary nebula?

The Planetary Nebulae, often shortened as PNe, are formed when a low mass star reaches the end of its life and transforms into a red giant star whose outer layers are expelled. Left behind in the ashes is the hot core of the star, now called a white dwarf, that makes the surrounding gas glow like a neon sign.

What happens when a star uses up all of its hydrogen?

(1) When a star exhausts the hydrogen in its core, it becomes a giant or supergiant. Once a star has used up all the hydrogen in its core, fusion of hydrogen into helium stops. The core starts to contract again (just as it contracted as a protostar, before hydrogen fusion began).

What happens to a star after it exhausts its core?

A star remains on the main sequence as long as there is hydrogen in its core that it can fuse into helium. Eventually the hydrogen fuel in the core runs out and fusion stops, shutting off the outward radiation pressure. What happens to a star after it exhausts its core hydrogen quizlet?

When the core of a star shrinks after hydrogen fusion stops?

When the core of a star shrinks after hydrogen fusion stops – the core cools and the star expands. Which of the following nuclear fuels does a one star use over the course of its entire evolution- hydrogen. Which star spends the longest time in the Protostellar phase of life?

What happens when a red giant star exhausts its fuel?

When a red giant star exhausts its core hydrogen fuel, the core contracts but the star expands as a whole. However, the shell of hydrogen outside the core heats up to very high temperatures (hotter than the core during the main-sequence phase), and hydrogen fusion is occurring quickly.