Most extreme white dwarf binary system found with orbit of just 5 minutes

Dunn, Peter
September 2010
Amateur Astronomy Magazine;Fall2010, Issue 67, p8
The article discusses a study conducted by a team of astronomers led by Gijs Roelofs of the Harvard-Smithsonian Center of Astrophysics, which found that the two stars in the binary system HM Cancri revolve around each other in just 5.4 minutes. The astronomers used the Keck telescope to detect the velocity variations in the spectral lines in the light of the system. The findings make HM Cancri the binary star with the shortest known orbital period.


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