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What are X-<strong>ray</strong> <strong>Binaries</strong>?<br />
Special class of binaries which emit predominantly in<br />
X-<strong>ray</strong>s<br />
The Most luminous galactic X-<strong>ray</strong> sources<br />
Lx ~ 10 36 to 10 38 ergs/s<br />
Consist of a compact object and a companion star<br />
orbiting about a common centre of mass.<br />
The compact object can be a white dwarf (cataclysmic<br />
variables), a neutron star or a black hole.<br />
Companion star can be a normal star or a white dwarf.
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