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Does fusion occur in white dwarf stars?
No. A white dwarf is the remnant of a star in which fusion as stopped.
Does a star that has no fuel but glows faintly is a black dwarf?
A star that has burned out and no longer has fuel to sustain nuclear fusion in its core is called a white dwarf, not a black dwarf. A white dwarf is the remnant core of a low to medium mass star after its outer layers have been ejected. Over time, a white dwarf will cool down and eventually become a black dwarf, but this process takes billions of years.
What causes stars to change during the white and black dwarf phases?
A white dwarf no longer produces energy through fusion but remains hot from the residual heat of the star it once was. It will radiate that energy away and slowly cool as a result, eventually becoming a black dwarf.
What does a black dwarf burn?
A black dwarf does not burn anything. A black dwarf is the cooled remnant of a dead star.
Is a white dwarf capable of fusing elements?
Not normally. A white dwarf is the remnant of a star in which fusion has stopped. If, however, a white dwarf has a close binary companion star it can accrete gas from that companion. If enough gas collects on the white dwarf it can ignite a complex reaction change between the hydrogen gas and the carbon, nitrogen, and oxygen of the surface. Unlike the steady fusion in a main sequence star, the fusion on a white dwarf is a runaway reaction that results in a massive explosion called a nova, which drives away the accreted gas and ends fusion. If the white dwarf is massive enough the accretion of gas can trigger carbon fusion inside the white dwarf, resulting in an even larger explosion called a type Ia supernova, which destroys the white dwarf.
Does fusion occur in white dwarf stars?
No. A white dwarf is the remnant of a star in which fusion as stopped.
Is a brown dwarf star on its way to becoming a black dwarf?
No. A brown dwarf is a star that has too low a mass to start nuclear fusion. A black dwarf is a former white dwarf, the remnant of a low to medium mass star that ran out of fuel in its core.
Does a star that has no fuel but glows faintly is a black dwarf?
A star that has burned out and no longer has fuel to sustain nuclear fusion in its core is called a white dwarf, not a black dwarf. A white dwarf is the remnant core of a low to medium mass star after its outer layers have been ejected. Over time, a white dwarf will cool down and eventually become a black dwarf, but this process takes billions of years.
How are black dwarfs created?
A star of similar mass to the sun dies and collapses, forming a white dwarf which cools, forming a black dwarf.A mass of dust and gas too small to ignite fusion collapses, forming a brown dwarf which cools, forming a black dwarf.
When its fusion stop a star will become either a black hole a neutron star or?
The other option is a white dwarf.
What remain of a star that has no fuel but glows faintly is a black dwarf?
A black dwarf is a theoretical stellar remnant that is predicted to form when a white dwarf cools down completely. It is essentially a cold, dark, and compact stellar remnant with no nuclear fusion activity. No black dwarfs are currently known to exist in the Universe due to the immense timescales required for white dwarfs to cool down to become black dwarfs.
What causes stars to change during the white and black dwarf phases?
A white dwarf no longer produces energy through fusion but remains hot from the residual heat of the star it once was. It will radiate that energy away and slowly cool as a result, eventually becoming a black dwarf.
What changes are happing during the life cycle of a white dwarf?
The white dwarf will cool down till it becomes a black dwarf. If it's part of a close binary with a main sequence, giant or supergiant, the white dwarf can gain mass from the other star. This can start fusion of carbon in the white dwarf. Other fusion reactions quickly follow, causing it to explode. This is known as type 1a supernova.
What happens to a star when the outward force of fusion is less than the inward force?
the star collapses in on itself, and usually when the fusion stops it is in the last stages of its life as a giant or supergiant and forms a white dwarf made of the carbon left over from the second stage of helium to carbon fusion from the core of the star that takes place after the hydrogen to helium fusion. after the white dwarf is formed it will eventually cool off into a black dwarf which is basically a carbon corpse of a star
What will happen to the sun when it runs out of fuel for fusion?
When the sun runs out of fuel for fusion, it will expand into a red giant, shedding its outer layers into space, before eventually collapsing into a white dwarf. This process will take several billion years to occur.
Will the sun become a brown dwarf?
No. A brown dwarf is a failed star, one that is not massive enough to start nuclear fusion. The sun is well above the threshold of fusion. When it dies it will become a white dwarf.
How can temperature either help fusion to occur or prevent fusion from occurring?
How can temperature either help fusion to occur or prevent fusion from occurring?
