Robert Lea is a science journalist in the U.K. whose articles have been published in Physics World, New Scientist, Astronomy Magazine, All About Space, Newsweek and ZME Science. He also writes about science communication for Elsevier and the European Journal of Physics. Rob holds a bachelor of science degree in physics and astronomy from the U.K.’s Open University. Follow him on Twitter @sciencef1rst.
— astounding given that it's a gas giant composed mostly of hydrogen and helium gas, the universe's lightest elements.
The second mechanism, the disk instability model, involves gravitationally unstable and dense patches of the protoplanetary disk collapsing and growing to form a gas giant lacking a rocky core. Despite hot-start being the commonly expected model, HD 114082 b's density seems to defy what astronomers would expect for a core accretion model, favoring instead the underdog, the cold start or disk instability model. Some older exoplanets discovered by other teams of astronomers also favor this cold model, but the team behind the new research warns not to scrap hot start planet formation models just yet.
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