Physics of White Dwarfs

In the United States, a conflict that one party collides with the other party and leaves the site is considered illegal. If a white dwarf collides with the sun, that is exactly right. It takes about 1 hour for a white dwarf to completely pass through the sun. And after giving huge damage and changing the chemical and physical properties of the sun, it will keep massive damage along that path. The first collision between the white dwarf and the main line star was studied by Israeli Michael Chalet of Tel Aviv University, Geora Chaviev, Odreggev.

Until 1926 when Ralph H. Fowler and S. Chandrasekhar in the early 1930s clarified, the physical structure inside the white dwarfs is still a mystery. At the same time, their research has become possible by changing the quantum revolution of physics. They show that the enormous pressure created by the strong gravity of the stars will crush the inner atoms. Thereby embedding the nucleus in the ocean of free electrons. The thermal energy can not balance with the gravitational destructive power inside the white dwarf. In contrast, stars are supported by quantum mechanical effects called electron degenerate pressure; at high density, free electrons can not be confined to the same energy state. In this way, the balance of the stars remains independent of thermal energy. As the star reaches this completely degraded state, its further evolution mainly involves gentle cooling and the size does not change much.

The white dwarf is the shrinkage of regular stellar debris and their supply of nuclear energy is depleted. The white dwarf consists of gravitational material, and the density due to gravity is very high, that is, there are several tones with a mass of spoonful. White dwarfs are cool and decline for billions of years. Type II They occur in more than 10 stars of the sun and they suffer an uncontrolled internal nuclear reaction at the end of their life and cause an explosion. They left neutron star and black hole. Supernovae are considered to be the main source of heavier elements than hydrogen and helium

The white dwarf is the size of our planet, but the quality and density are much bigger. Compared to the Earth, white dwarfs are so dense that one teaspoon of material from a white dwarf will weigh up to 5.5 metric tons on the surface of the earth! The universe imposes restrictions on the life of a white dwarf. A neutron star is a very dense degenerate neutron sphere (all accepted particles, electrons or neutron states are filled and gases behave differently than normal gases). Some neutron stars have a huge magnetic field that sweeps the beam of radiation into space like a light beam from the lighthouse. This pulsating neutron star is called a pulsar. This measurable radiation pulse is the name of this type of neutron star.