First White Dwarf Pul­sar Dis­cov­ered

The Economic Times - - Around The World -

Astronomers have iden­ti­fied an elu­sive white dwarf pul­sar — the first of its kind to be dis­cov­ered in the uni­verse — housed in an ex­otic bi­nary star sys­tem 380 light years away from Earth. In a study, pub­lished in the jour­nal Na­ture Astronomy, re­searchers iden­ti­fied the star AR Scor­pii (AR Sco) as the first white dwarf ver­sion of a pul­sar. The white dwarf pul­sar has eluded astronomers for over half a cen­tury. AR Sco lies in the con­stel­la­tion Scor­pius, 380 light years from Earth, a close neigh­bour in as­tro­nom­i­cal terms. The white dwarf in AR Sco is the size of Earth but 200,000 times more mas­sive, and is in a 3.6 hour or­bit with a cool star one-third the mass of the Sun, the study said.

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