![](https://lemmy.world/pictrs/image/282255b0-9932-4203-83a3-02d08f704a68.jpeg)
![](https://lemmy.world/pictrs/image/e39f7de0-87ef-4c0a-afe7-97cfc40ed9da.webp)
TLDR ; Physicists cannot exactly explain x-ray 10% amplitude oscillations at periods from 400s to 1000 s, observed from the surrounding of a black hole, despite some hypothesis including that a white dwarf would be orbiting it at aprox 50% light speed.
This is another burning hot California topic.