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A typical white-dwarf star is the size of your moon but has the mass of your sun what is the surface gravity of this star?
The surface gravity of a white dwarf star with the mass of our Sun and the size of our Moon would be extremely high, much greater than what we experience on Earth. This is because gravity is directly proportional to the mass of the object. The intense gravity on the surface of such a white dwarf would crush any normal matter that comes into contact with it.
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 a white dwarf exceeds the Chandrasekhar limit what happens?
When a white dwarf exceeds the Chandrasekhar limit of about 1.4 times the mass of the Sun, electron degeneracy pressure is no longer able to support the star against gravity. This leads to the collapse of the white dwarf, resulting in a supernova explosion.
Why does a star become a white dwarf?
A star becomes a white dwarf when it exhausts its nuclear fuel and can no longer produce energy through fusion reactions. Gravity causes the core to collapse while the outer layers are expelled into space, leaving behind a dense, Earth-sized remnant known as a white dwarf.
How much smaller is a white dwarf compared to its main sequence size?
A huge amount. As a rough comparison: Main sequence size a beach ball, white dwarf size a marble. The white dwarf, though is millions of times denser than it's main sequence parent.
What happens to the size of a white dwarf when its mass is increased?
When the mass of a white dwarf increases, its size decreases. This is because the increased mass causes the white dwarf to contract under its own gravity, making it smaller and denser.
What happens with the white dwarf in a type 1a supernova?
The white dwarf collapses under its own gravity. This starts very rapid nuclear fusion reactions. It explodes as a supernova and "stuff" is scattered into space. Essentially nothing of the white dwarf, as an object, remains.
A typical white-dwarf star is the size of your moon but has the mass of your sun what is the surface gravity of this star?
The surface gravity of a white dwarf star with the mass of our Sun and the size of our Moon would be extremely high, much greater than what we experience on Earth. This is because gravity is directly proportional to the mass of the object. The intense gravity on the surface of such a white dwarf would crush any normal matter that comes into contact with it.
Who is denser white dwarf or a planet?
A white dwarf is denser than a planet. White dwarfs are stellar remnants that have collapsed under gravity, packing a large amount of mass into a small volume. Planets, on the other hand, have much lower densities compared to white dwarfs due to their composition and structure.
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.
Why does a star become a white dwarf?
A star becomes a white dwarf when it exhausts its nuclear fuel and can no longer produce energy through fusion reactions. Gravity causes the core to collapse while the outer layers are expelled into space, leaving behind a dense, Earth-sized remnant known as a white dwarf.
When a white dwarf exceeds the Chandrasekhar limit what happens?
When a white dwarf exceeds the Chandrasekhar limit of about 1.4 times the mass of the Sun, electron degeneracy pressure is no longer able to support the star against gravity. This leads to the collapse of the white dwarf, resulting in a supernova explosion.
How much smaller is a white dwarf compared to its main sequence size?
A huge amount. As a rough comparison: Main sequence size a beach ball, white dwarf size a marble. The white dwarf, though is millions of times denser than it's main sequence parent.
What type of stars has a low temperature and high luminosity?
A white dwarf.A white dwarf.A white dwarf.A white dwarf.
Why would a white dwarf become a red dwarf?
A white dwarf could not become a red dwarf. A white dwarf is a remnant of a dead star. A red dwarf is a star with a very low mass.
Why do white dwarfs not continue to contract as they cool?
White dwarfs do not continue to contract as they cool because of electron degeneracy pressure, a quantum mechanical effect that resists further compression. As they cool, the electrons occupy lower energy levels, resulting in a decrease in pressure and temperature, causing the white dwarf to gradually fade into a black dwarf.
Are white dwarf stars always white?
No in the life cycle of a star, a white dwarf can cool and become a black dwarf
