Using NASA's TESS space telescope observations, a team of scientists is aware that an exoplanet lived in a region where no one could survive. The studio is led by Tiago Campante, from the Institute of Astrophysics and Space Sciences (IA) of Portugal and has been published today. The Astrophisical Journal.
Researchers have come to this conclusion by examining the pulsations – the barking – of the giant red stars (HD 212771 and HD 203949). Both stars have been detected by him. TESS Previously, it was known that they housed planets, but one of these had been charred and finally 'swallowed' by their star growth.
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A star enters the giant red phase when he now takes the hydrogen to keep going, so he begins to use helium if there is a need to multiply his size by 200 times. When the Sun arrives at this stage, Mercury, Venus and even the Tierra will be razed by the star.
The authors focus their attention on the evolution of star HD 203949 and realized that his last expansion had to reach the orbit of the vecino planet and even much more.
“The analysis seems to suggest that the star is too evolved as to accommodate a planet in such an orbital distance situation. However, from the exoplanet analysis, we know that the planet is there, "says co-author Vardan Adibekyan of the University of Porto.
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The team performed several simulations to try to explain the unprecedented survival of this planet. So that made a possible conclusion: before, the exoplanet was in an orbit but LejanaBut when the star has come back to contract, the gravity of this attraction will put it in orbit where we see it today.
“The solution to this scientific dilemma is hidden in the simple fact that the stars and their planets in the ground form, which also evolved together. In this particular case, the planet managed to avoid being involved, ”says Adibekyan in the studio.