Astronomers have discovered an ancient planet, a hot version of Jupiter, appearing around the ancient G-type dwarf star TOI-5542 in the constellation Confucius.
According to Sci-Newsresearch carried out by a group of scientists from Switzerland, England, America, the Netherlands, South Africa and Chile discovered one of the The oldest planet in the universe in our huge data warehouse “Exoplanet Hunter” TESS (NASA’s space telescope).
The results were confirmed by several other powerful ground-based telescopes. The old planet was called TOI-5542b named after the parent star, located 1,154 light years away from us in the constellation Confucius.
Graphic depicting a hot Jupiter orbiting a G-type dwarf star
Graphic image representing a hot Jupiter orbiting a G-type dwarf star – (Photo: SCI-NEWS).
Astronomer Nolan Grieves of the University of Geneva in Switzerland, lead author of the study, said it was a giant planet the size of Jupiter in the solar system but orbits very close to its mother star, it therefore belongs to the group “Hot Jupiter”.
“Even with an occurrence rate as low as 1%, hot Jupiters remain one of the most common exoplanet groups known, due to the observational bias of current detection methods toward planets.” Crystals are close, large and have great mass. ” – explained Dr. Grieves.
He then analyzed: “Hot Jupiters are affected by intense stellar radiation, which can deposit energy inward, giving them larger radii than would be expected based on models of their internal structure. They are also affected by strong tidal forces, which can lead to tidal locking, reducing the orbital eccentricity and rotation period of the planet, as well as the intense contrasts between day and night.
Tidal lock or gravity lock is the phenomenon in which a celestial body is strongly influenced by the gravitational force of the larger celestial body it orbits, leading it to always turn toward the parent celestial body with only one face, like how the Moon does always facing the Earth.
TOI-5542b can be further classified as “Hot Jupiter”, that is to say not the hottest. It orbits its parent star every 75.12 days and has an average temperature of around 168 degrees Celsius.
With moderately warm temperatures and distances between 10 and 200 days, these exoplanets are close enough to their parent star to constrain models of planetary evolution, and far enough away to be less affected by their parent star. like some other extremely close hot Jupiters.
Thus, TOI-5542b may retain many of the same ancient characteristics as when it was born, becoming a treasure for researchers, who always wish to better understand the history of planet formation in order to solve the codes of mysteries linked to the birth. of the Earth itself and our planet.
The research has been approved and will be published in the journal Astronomy and astrophysics number to come.
Article source: NLD
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Astronomers have discovered an ancient planet, a hot version of Jupiter, appearing around the ancient G-type dwarf star TOI-5542 in the constellation…