This brown dwarf star is bigger than Jupiter and hotter than the Sun
Weizmann Institute of Science says this system offers scientists an unprecedented opportunity to study hot Jupiter atmospheres in particular while also helping advance our understanding of planetary and stellar evolution. “We’ve identified a star-orbiting hot Jupiter-like object that is the hottest ever found, about 2,000 degrees hotter than the surface of the Sun," said lead author of the study Na’ama Hallakoun in a statement.
She explains that unlike other hot Jupiters, which are harder to study because of the glare from their host stars, this system has a star that is 10,000 times fainter than a normal one, making it a “perfect laboratory for future studies of hot Jupiters’ extreme conditions." The scientists say the system consists of two different kinds of “dwarfs." One of the objects is a “white dwarf," which is left of a Sun-like star after it runs out of fuel. The other object is a “brown dwarf," which is much more massive than most planets but does not have enough mass to ignite nuclear fusion, turning it into a star.
Sometimes stars’ gravities can rip apart objects that come too close. But this brown dwarf is quite dense, with a mass of about 80 Jupiters squeezed into the size of, well, Jupiter.
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