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What can cause a white dwarf to reignite?
The most likely way to reignite fusion in a white dwarf is for gas from a close binary companion to be pulled to it by gravity. As the gas collects the white dwarf heats up and may either ignite fusion in the hydrogen or in the carbon of the white dwarf itself.
When does a nova event occurs if a white dwarf accepts material from a nearby?
A nova event occurs when a white dwarf in a binary system accepts material from a nearby companion star, causing a runaway nuclear fusion explosion on the surface of the white dwarf. This explosion results in a sudden increase in brightness that can last for several days to a few weeks.
What causes a nova explosion?
A nova explosion comes about of a white dwarf star has a neighbouring main sequence or aging star and is taking hydrogen and helium gas from that star. Over time, the gasses around the super dense white dwarf star build up and are compressed under the extreme gravity. Eventually the white dwarf star will ignite and explode in a runaway nuclear fusion reaction. Its different from a Super nova explosion.
What is the absolute magnitude of procyon?
2.65. It has a white dwarf companion of about 13
What may result when a white dwarf in a close binary system accretes matter from the companion star?
If a carbon-oxygen white dwarf accretes matter from the companion star it can reach a point where the outward pressure is not sufficient to support its plasma and it collapses until the internal pressure and heat ignite carbon fusiion in the core - producing a type 1a supernova.
What is the explosion of a dwarf star called?
The explosion of a dwarf star is called a nova or a supernova, depending on the type of dwarf star and the circumstances of the explosion. Novas are less powerful explosions caused by a white dwarf siphoning material from a companion star, while supernovas are much more energetic explosions that can occur in white dwarfs or other types of stars.
What can a white dwarf do to it's companion star?
Depending on the distance between the binary pair, it is possible for the white dwarf to draw gas from it's companion causing the star to reach the Chandrasekhar limit causing the white dwarf to explode as a nova or a type La supernova.
What produces a type-1 supernova?
A type-1 supernova is produced by the explosion of a white dwarf star in a binary system. This occurs when the white dwarf accretes material from its companion star, triggering a runaway nuclear fusion reaction that results in a sudden and catastrophic explosion.
What can cause a white dwarf to reignite?
The most likely way to reignite fusion in a white dwarf is for gas from a close binary companion to be pulled to it by gravity. As the gas collects the white dwarf heats up and may either ignite fusion in the hydrogen or in the carbon of the white dwarf itself.
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.
When does a nova event occurs if a white dwarf accepts material from a nearby?
A nova event occurs when a white dwarf in a binary system accepts material from a nearby companion star, causing a runaway nuclear fusion explosion on the surface of the white dwarf. This explosion results in a sudden increase in brightness that can last for several days to a few weeks.
What is the supernovae trigger model?
The supernova trigger model proposes that the explosion of a white dwarf in a binary star system can be triggered by the accretion of material from its companion star. As the white dwarf gains mass, it eventually reaches a critical limit, known as the Chandrasekhar limit, leading to a runaway nuclear fusion reaction and resulting in a supernova explosion.
What causes a white dwarf supernova?
A white dwarf supernova occurs when a white dwarf star in a binary system accretes material from a companion star, causing it to exceed the Chandrasekhar limit (1.4 solar masses). The core then undergoes a runaway nuclear fusion reaction, leading to a catastrophic explosion that destroys the white dwarf.
What causes a nova explosion?
A nova explosion comes about of a white dwarf star has a neighbouring main sequence or aging star and is taking hydrogen and helium gas from that star. Over time, the gasses around the super dense white dwarf star build up and are compressed under the extreme gravity. Eventually the white dwarf star will ignite and explode in a runaway nuclear fusion reaction. Its different from a Super nova explosion.
What is the absolute magnitude of procyon?
2.65. It has a white dwarf companion of about 13
What may result when a white dwarf in a close binary system accretes matter from the companion star?
If a carbon-oxygen white dwarf accretes matter from the companion star it can reach a point where the outward pressure is not sufficient to support its plasma and it collapses until the internal pressure and heat ignite carbon fusiion in the core - producing a type 1a supernova.
What is a Chandrasekhar mass and how does it relate to a supernova?
A Chandrasekhar mass is the maximum mass limit (about 1.4 times the mass of the Sun) that a white dwarf star can have before it collapses under its own gravity and triggers a supernova explosion. When a white dwarf accretes matter from a companion star or merges with another white dwarf, exceeding the Chandrasekhar mass, it can collapse and explode as a Type Ia supernova.
