Evidence for a polar circumbinary exoplanet orbiting a pair of eclipsing brown dwarfs:Evidence for a polar circumbinary exoplanet

One notable example of exoplanet diversity is the population of circumbinary<br/>planets, which orbit around both stars of a binary star system. There are so far<br/>only 16 known circumbinary exoplanets, all of which lie in the same orbital plane<br/>as the host binary. Suggestions exist that circumbinary planets could also exist on<br/>orbits highly inclined to the binary, close to 90◦, polar orbits. No such planets have<br/>been found yet but polar circumbinary gas and debris discs have been observed<br/>and if these were to form planets then those would be left on a polar orbit. We<br/>report strong evidence for a polar circumbinary exoplanet, which orbits a close<br/>pair of brown dwarfs which are on an eccentric orbit. We use radial-velocities to<br/>measure a retrograde apsidal precession for the binary, and show that this can<br/>only be attributed to the presence of a polar planet.