General Relativity Aces a Test at Supermassive Black Hole

[CygnusX-1]

General relativity passes test at Milky Way’s central black hole

by Ken Croswell

For the first time, astronomers use stars orbiting a supermassive black hole to test Einstein's general theory of relativity, finding no sign of a fifth fundamental force.

Links: John Batchelor Show
New Scientist

 

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arXiv

S-02 will change its radial velocity by ~5000 km/s within 1-2 months in spring 2018, and relativistic corrections contribute ~100 km/s to it.