X-ray bursters,like novae,are thought to involve close binaries whose stars are engaged in mass transfer.

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X-ray bursters are indeed thought to involve close binaries where one star is a neutron star or a black hole and the other star is an ordinary star that is transferring mass onto the compact object. As the accretion disk around the compact object grows, it eventually becomes unstable and a burst of X-rays is released.

X-Ray Bursters,like Novae,are Thought to Involve Close Binaries Whose Stars