My channel also press bell icon for future video notifications. Thanks the core mass of the giant exoplanet wasp 107b is much lower than what was thought necessary to build up the immense gas envelope surrounding giant planets like jupiter and saturn. Astronomers at universite de montreal have found this intriguing discovery by ph d student, caroline piele of udaymiz institute for research on exoplanets irex suggests that gas giant planets form a lot more easily than previously believed. Pla is part of the groundbreaking research team of udam astrophysics, professor bjorn benecke, that in 2019 announced the first detection of water on an exoplanet located in its star’s habitable zone, published today in the astronomical journal with colleagues in canada, the u.s, germany and japan. The new analysis of wasp 107bs internal structure has big implications, said benaki. This work addresses the very foundations of how giant planets can form and grow. He said it provides concrete proof that massive accretion of a gas envelope can be triggered for cores. That are much less massive than previously thought as big as jupiter but 10 times lighter wasp 107b was first detected in 2017, around wasp 107, a star about 212 light years from earth in the virgo con. The planet is very close to its star over 16 times closer than the earth as to the sun as big as jupiter but 10 times lighter wasp 107b as one of the least dense exoplanets known a type that astrophysicists have dubbed super puff or cotton candy planets Pla and her team first used observations of wasp 107b obtained at the keck observatory in hawaii to assess its mass.

More accurately, they used the radial velocity method, which allows scientists to determine a planet’s mass by observing the wobbling motion of its host star due to the planet’s gravitational pull. They concluded that the mass of wasp 107b has about one tenth, that of jupiter or about 30 times that of earth. The team then did an analysis to determine the planet’s most likely internal structure. They came to a surprising conclusion with such a low density. The planet must have a solid core of no more than four times the mass of the earth. This means that more than 85 percent of its mass is included in the thick layer of gas that surrounds this core by comparison, neptune, which has a similar mass to wasp 107b, only has 5 to 15 percent of its total mass in its gas layer. We had a lot of questions about wasp 107b said pla. How could a planet of such low density form and how did it keep its huge layer of gas from escaping, especially given the planet’s close proximity to its star? This motivated us to do a thorough analysis to determine its formation history, a gas giant in the making planets form in the disk of dust and gas that surrounds a young star called a protoplanetary disk. Classical models of gas giant planet formation are based on jupiter and saturn. In these a solid core at least 10 times more massive than the earth is needed to accumulate a large amount of gas before the disc dissipates.

Without a massive core gas giant planets were not thought able to cross the critical threshold necessary to build up and retain their large gas envelopes. How, then do explain the existence of wasp 107b, which has a much less massive core mcgill university, professor and irex member eve? Lee a world renowned expert on super puff planets, like wasp 107b, has several hypotheses for wasp 107b. The most plausible scenario is that the planet formed far away from the star where the gas in the disk is cold enough. That gas accretion can occur very quickly. She said the planet was later able to migrate to its current position, either through interactions with the disk or with other planets. In the system. Discovery of a second planet, wasp 107 see the keck. Observations of the wasp 107 system cover a much longer period of time than previous studies have allowen. Also interesting. The eccentricity of this second planet is high, meaning its trajectory around its star is more oval than circular. Wasp 107c has, in some respects kept the memory of what happened in its system said pla. Its great eccentricity hints at a rather chaotic past, with interactions between the planets, which could have led to significant displacements, like the one suspected for wasp 107b. Several more questions: beyond its formation history, there are still many mysteries surrounding wasp 107b studies of the planet’s atmosphere with the hubble space telescope, published in 2018 revealed one surprise. It contains very little methane that’s strange because for this type of planet, methane should be abundant, said pla, we’re.

Now reanalyzing hubble’s observations with the new mass of the planet to see how it will affect the results and to examine what mechanisms might explain the destruction of methane. The young researcher plans to continue studying wasp 107b, hopefully with the james webb space telescope set t exoplanets like wasp 107b that have no analog in our solar system. Allow us to better understand the mechanisms of planet formation in general and the resulting variety of exoplanets. She said it motivates us to study them in great detail. Please support my channel to grow by pressing, subscribe button and the bell icon. We will notify you technological news.

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