Scientists may have observed the youngest planet discovered in the galaxy

Using radio telescopes, scientists managed to spot a baby exoplanet while it was just forming in the accretion disk around the star and forming its moons.

BingMag.com Scientists may have observed the youngest planet discovered in the galaxy

Using radio telescopes, scientists managed to spot a baby exoplanet while it was just forming in the accretion disk around the star and forming its moons.

The Atacama Telescope Array has detected gas in the accretion disk around a distant star for the first time. This detection shows that there may be a baby exoplanet with a mass equal to Jupiter around the star, which is forming its own moons. The Atacama Millimeter/Submillimeter Array (ALMA) discovered a distinct light spot near the star AS 209, less than 1 million years old, shining in the gas gap of the accretion disk surrounding the star.

Jehan Bae Jaehan Bae, the lead author of this study and a professor of astronomy at the University of Florida, said: "The best way to study the process of planet formation is to directly observe the planets being formed. We live in a very exciting time when, thanks to powerful telescopes, we have the possibility to observe such an event." According to the research team, gas discoveries like this will provide more information about how planetary atmospheres form and how they come together. It presents the moons in the early stages of the solar system.

BingMag.com Scientists may have observed the youngest planet discovered in the galaxy

Position of gas detected in the accretion disk of the star system AS 209
Credit: ALMA (ESO/NAOJ/NRAO), J. Bae (U. Florida)

Possible exoplanet in a system 395 years away There is a light from the earth, which is a relatively close distance from the cosmic point of view. But the planet itself is 200 AU (200 times the Earth-Sun distance) away from the host star, which gives astronomers a new perspective on how planets form.

Based on current theories of planet formation, scientists think that Gas giants form better in regions where there is plenty of gas and dust available. In contrast, there is the notion that the outer parts of star systems are full of smaller, icy objects like the Kuiper Belt in our own solar system.

As for how the disk of AS 209 could have prevented the formation of a planet this large, at this distance, Far away from the supporting star, scientists consider several possibilities. One idea is that the disk was gravitationally unstable in the distant past, perhaps due to some kind of tidal disturbance.

However, new simulations show that such instabilities can only result in fragments several times the mass of Jupiter. produce According to the researchers, even if this happens, the planets are less likely to migrate after they form.

Furthermore, the accretion disk AS 209 has a relatively low mass and is already known based on its gas density and temperature profile. In the middle screen, it seems to be stable. "Although it is not impossible that the disc was sufficiently massive in the past, the low mass of the present-day disc suggests that it must have been He has lost his crime very strongly."

BingMag.com Scientists may have observed the youngest planet discovered in the galaxy

Star system AS 209 as seen by ALMA
Credit: ALMA (ESO/NAOJ/NRAO), A. Sierra (U. Chile)

Another major possibility for the formation of this planet is accretion of pebbles And researchers are trying to discover the scenarios that may lead to such an event. It's not clear how the planet's core grew enough, and why, in doing so, it failed to trap millimeter grains beyond its orbit, although researchers suggest several ways that gas accretion might have made it possible.

The team is also investigating whether there were enough pebbles around that they could have clumped together to form a giant planet through increased pressure or outflows in the gas around the star. The time frame of this mass increase, along with its rate, is still unknown.

The members of the research team described this discovery as novel in that the existence of circumplanetary disks around exoplanets has not been proven before. Was. Although they emphasized that in 2019, scientists using ALMA were able to detect a moon-forming disk around the exoplanet PDS 70c and confirm this discovery in 2021.

Cover photo: A star with a disk A protoplanet, where planets are forming.
Credit: L. Calada/ESO

Sources: Space, SciTechDaily

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