How does the outbreak of a new star occur?

The outbursts of new stars occur in closely spaced binaries, one of which is a white dwarf and the other a normal main sequence star. The Kalik star, which has used up its hydrogen reserves, deforms the neighboring star with its strong gravitational field and causes a gradual flow of gas from its rarefied envelope. The incoming gas with a high concentration of hydrogen gradually accumulates and condenses around the white dwarf. When the critical value of the density of the gas envelope around the white dwarf is reached, the reaction of thermonuclear fusion of helium from hydrogen begins and very quickly spreads to the entire envelope. A giant thermonuclear explosion occurs, observed as the outbreak of a new star.

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