A binary star system in which one star of the pair is an optically invisible X-ray source.
X-ray binaries are a class of binary stars that are luminous in X-rays. The X-rays are produced by matter falling from one component, called the donor to the other component, called the accretor, which is compact: a white dwarf, neutron star, or black hole. The infalling matter releases gravitational potential energy, up to several tenths of its rest mass, as X-rays. An estimated 1041 positrons escape per second from a typical hard low-mass X-ray binary.
The numerical value of X-ray binary in Chaldean Numerology is: 3
The numerical value of X-ray binary in Pythagorean Numerology is: 2
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"X-ray binary." Definitions.net. STANDS4 LLC, 2017. Web. 15 Dec. 2017. <http://www.definitions.net/definition/X-ray binary>.