Planet with temperatures as high as a small star detected


A discovery, published in the journal ‘Astronomy & Astrophysics’, is part of the first results of the space telescope CHEOPSlaunched last year by the European Space Agency (THAT).

According to information released today in a statement by the IA, the planet, called WASP-189b, is 20 times closer to its star than Earth is to the Sun and completes a orbit in just 2.7 days.

The researchers put it in the category of ‘Hot Jupiter’, a type of exoplanet with a mass similar to that of Jupiter but with a orbit very close to its star that lasts less than 10 days. Mercury takes 88 days to complete the orbit around the sun.

The planet will be about 1.6 times the diameter of Jupiter.

“Thanks to the enormous precision of CHEOPS, we can measure the light emitted by the day side of this exoplanet. This gave us some data about the conditions of the atmosphere of this exotic planet. Its temperature of about 3,160º C makes it as hot as a small mass star “, explained in the statement, Olivier Demangeon, one of the AI ​​researchers involved in the discovery.

Susana Barros, also from the IA, said that the mother star is a blue star and that it is bigger and almost two thousand degrees hotter than the sun. at the equator and flattened us polos, which makes them hotter and brighter than the equator.

The satellite CHEOPS (Characterising Exoplanet Satellite, or satellite characterization of exoplanets) was designed to observe nearby stars, around which it is already known to exist exoplanets.

The researchers cited in the statement admit that WASP-189b formed more far from the star and that it later suffered disturbances gravitational other planets or even a passing star, which inclined you to orbit and pushed it very close to the star.

The consortium of CHEOPS is led by Switzerland and the THAT and has the participation of 11 European countries, one of them Portugal.

“The participation of the IA in the consortium of CHEOPS is part of a more comprehensive strategy to promote research in exoplanets in Portugal, through the construction, development and scientific definition of various space instruments and missions, such as the CHEOPS or the spectrograph ESPRESSO, already in operation at the Observatório do Paranal (THAT) “in Chile, it is said in the statement, explaining that investment in this area will continue for years to come.

It is also expected that in the coming years the CHEOPS observe hundreds of exoplanets known and detete new exoplanets and even exoluas, as well as investigate the internal composition and atmosphere of exoplanets.

The IA includes researchers from the University of Lisbon and the University of Porto.

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