They detect a 'hot Jupiter' that escapes from theories of planetary formation

Every week, telescopes around the world detect new exoplanets - which orbit around stars other than the Sun - but the last one found by the United Kingdom Infrared Telescope (WTS-UKIRT) located in Hawaii is out of the ordinary. "It is a special planet because it has a very large radius, given its mass and age, and according to the current theories of planetary formation," explains Luis Sarro Baro, researcher at the Artificial Intelligence department of the UNED and one of the authors of the finding, which is described in the Monthly Notices of the Royal Astronomical Society magazine.

These theories predict that the radii of newly formed planets decrease with the passage of time as they radiate their internal energy. However, considering that the discovered exoplanet - named WTS-1b - and its progenitor star were formed 600 million years ago, the body should be 20% larger than Jupiter and not 50%, as observes.

"The importance of this discovery is that the planet is very swollen, which challenges the conventional models of planetary evolution and supports the hypothesis that this type of planets may have been formed in a radically different way than those of the Solar System ", comments another one of the authors, Eduardo Martín, researcher of the CAB (INTA-CSIC) and also co-author of the work.





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