Cataclysmic variables can host planets and a team of astronomers found some. It's a whole new method of detecting exoplanets.
. The four CVs exhibit very long photometric periods , which are periods of enhanced luminosity that don’t conform to the binary’s orbital periods.point. It’s a gravitational equilibrium point between the stars. The L1 point is dynamic, and its position changes as the stars move. Lead author Chavez showed in a previous paper that a third body, a planet, can cause oscillations in the L1 point.
By measuring the changes in brightness of the four CVs, the researchers calculated the distances and masses of potential third bodies in the systems based on the brightness changes in each system. Their calculations show that the variations have much longer periods than the orbital periods of the stars. According to the team, two of the four CVs they studied have “bodies resembling planets” orbiting them.
This isn’t the first time scientists have tackled CVs and tried to find an explanation for the variations in the luminosity. In 2017 a separate team of researchers published a paper presenting the four CVs and their VLPPs. They suggested that planets were the cause. But they said that “… the third-body orbital plane should be greater than 39.2 degrees for this mechanism to be effective in disturbing the inner binary effectively.
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