Discovered exoplanets with multi-layered atmospheres like Earth

Moving too close to its host star, exoplanet WASP-189 b is extremely hot and completes one orbit in just 2.7 days.

Astronomers analyzed one of the most extreme exoplanets known, WASP-189 b, and found it to have a multi-layered atmosphere similar to Earth’s, IFL Science on Jan. news. However, the similarities are only that. This planet has twice the mass of Jupiter with a high temperature of thousands of degrees, so humans cannot move to live.

WASP-189 b is extremely hot due to its proximity to its host star. It orbits its host star in just 2.7 days at a distance of 1/20 of the Earth-Sun distance. But thanks to that, scientists were able to study the atmosphere of WASP-189 b in detail.

According to research published in the journal Nature Astronomy, an international team of experts has identified the presence of iron, chromium, vanadium, magnesium, manganese and titanium oxides in the planet’s atmosphere.

“We measured the light from the host star shining through the atmosphere of WASP-189 b. The gases in the planet’s atmosphere absorb some of the starlight, just as ozone absorbs some of the sunlight in the atmosphere. Earth, thereby leaving a characteristic ‘fingerprint’. With the help of the exoplanet hunting machine HARPS, we have identified the corresponding substances,” said expert Bibiana Prinoth at Lund University, city research team member, said.

Titanium oxide is a particularly interesting discovery because scientists have found it in an ozone-like layer and some stratospheric layers on other exoplanets. However, the new study also found evidence of additional layers.

“We found that the ‘fingerprints’ of different gases changed slightly from our predictions. We think strong winds and other processes could cause this change. The fingerprints of each type. The gases are altered in their own ways, suggesting that they exist in different layers – similar to the fingerprints of water vapor and ozone on Earth that wouldn’t look the same from a distance,” explains Prinoth.

There are many things that scientists do not know about the atmospheres of exoplanets, even the atmospheres of gas giant planets in the solar system are still very mysterious. New research sheds light on why exoplanets like WASP-189 b don’t have monolayer atmospheres.

“We believe that to fully understand these and other types of planets, including planets more like Earth, we need to study the three-dimensionality of their atmospheres. This requires understanding innovation in data analysis techniques, computer modeling and fundamental atmospheric theory building,” concludes study co-author Kevin Heng.

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