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Vue d'artiste d'une exoplanète à proximité de son étoile. © Nasa / JPL-Caltech

This giant planet falls on its star

The new planet TOI-2109b has been discovered orbiting a star 855 light years away from us. The planet’s orbit is so narrow that it orbits its star in just 16 hours. Scientists expect it to fall into its star within a few million years.

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[EN VIDÉO] Extraterrestrials
What is Exoplanet, where are they found, and why are they so interesting? Video Answer!

2020 to 13, the Telescope Spatial Des (Satellite Survey Extraterrestrials In traffic) began to look towards TOI-2109, a Star One and a half times as big as ours சோலைல் And located at 264 barracks (approximately 855 years) Lights) Ours The Solar System. For almost a month, the space telescope collected measurements Brightness Of the star then analyzed by scientific teams Des.

Transportation system for detecting extraterrestrials

Using Mode of transport, The presence of an object orbiting a star can be determined by studying its luminosity variations: As an object moves between the observer and the star, the measured luminosity of the star decreases slightly. The event was observed by Tess scientists, prompting them to inform the astronomical community about it, thanks to additional observations made by ground-based telescopes, confirming the existence of a planet around you-2109.

By measuring Frequency The luminosity measured by the telescope varies, and scientists were able to detect it The period of the revolution (Duration What puts Star To create a complete turn around the center of the sound Around the circular path) Of this planet, and their discovery was astonishing: in just 16 hours, it would complete a complete circle around its star.

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A “high-hot Jupiter” will fall on its star

With the help of various measurements Wavelengths Optical and Infrared, Was discovered by the research team Mass And the size of TOI-2109b, five times larger and 35% larger Thursday. It orbits at a very short distance from its star, about 2.5 million kilometers (in comparison, the planet Mercury in the Solar System is about 60 million kilometers away from it): it is the narrowest orbit. Of all the gas giants observed to date.

Due to its very tight orbit, and in most cases ” Hot Thursday As is known, the planet is in orbit Consistent With its star: it always gives it the same page, thus creating a permanent day page and a permanent night page. According to scientists, at such a short distance from its star, the surface temperature on the daytime side of this exoplanet is estimated at 3,500 C, which is as hot as a small star, making the planet the second warmest. Compared to “hot Jupiter”, it is classified as “over-hot Jupiter”, usually more and more cold from their star.

The very short orbit of TOI-2109b makes scientists believe that it will fall into its star within a few million years. According to Ian Wong, the study’s lead author, ” In a year or two, if we are lucky, we will be able to find out how close the planet is to its star. .

Researchers hope to observe TOI-2109b in the future with more powerful instruments, especially thanks to space telescopes Hubble And James-Webb, to shed light on the conditions under which “Hot Jupiter” falls on their star. Further observations will also allow us to understand how a large planet such as the TOI-2109b could reach such a narrow orbit, a phenomenon unnoticed in our solar system.