There were survivors on the Red giant ‘s close-up orbit.

Scientists from Spain’s Space Research Institute have used star-setography to conduct an in-depth study of two known red giants and found a seemingly impossible planet around one of them, the Physicist Sina.

红巨星近距离轨道竟有幸存者

The team studied red giants HD 212771 and HD 203949, which are also the first known exoplanets to detect surface shocks at NASA’s TesS, Tess. Study leader Thiago Campont said: “TesS observations are very accurate and can measure the soft vibrations on the surface of a star. The two late-stage stars also have planets, providing an ideal experimental platform for studying the evolution of planetary systems. “

The researchers first determined the physical properties of the two stars, such as their mass, size and age, and then focused on the evolutionary state of HD 203949 in the hope of understanding how its planets avoid being swallowed up.

“Analysis of the star seems to suggest that the star has evolved too far to contain a planet at such a short orbital distance, and our current analysis of exoplanets suggests that the planet does exist,” the researchers said. “

The team concluded, using extensive numerical simulations, that the tidal action between stars and planets could cause the planet to move inward from its original, wider orbit and position it in the position we see today. “The solution to this scientific puzzle is hidden in a simple fact: stars and their planets evolve together as they form,” they said. In this particular case, the planet managed to avoid the fate of being swallowed up. “

Over the past decade, star-setography has had a major impact on the study of sun-like stars and red giants, mainly from NASA’s Kepler telescope, which will make further progress over the next decade as TESS has more data.

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