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Chandra reveals a ring around R Aquarii’s equator: evidence of the 1073 nova eruption?

R Aquarii (R Aqr) is a binary star system consisting of a white dwarf with a Mira star companion. Over 17 years of x-ray monitoring with the Chandra x-ray telescope have revealed new information on the system,  including a ring of material around its equator - a likely leftover from the 1073 nova eruption.  

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