Artist’s concept of a gas giant exoplanet like Jupiter orbiting a small red dwarf star named TOI-5205. This is the ‘forbidden planet’.
Nationalgeographic.co.id—Many unique planets in the universe. Some have thin rings like Saturn’s, others have rings many times the size of those outside our solar system.
Recently astronomers discovered a gas giant planet like Jupiter named TOI-5205b. The planet orbits the red dwarf star TOI-5205. What is unique about the planets and stars they surround is their size ratio.
The exoplanet TOI-5205b is similar in size to Jupiter, but very close to its star. Its revolution period (1 time around the star) is once every 1.6 days. Meanwhile, the red dwarf star TOI-5205 is small – just under 40 percent of the radius and mass of the Sun.
The knowledge of the gas giant planet and its red dwarf star was investigated by astronomers at The Astronomical Journal on February 21, 2023. Astronomers pass a paper entitled “TOI-5205b: A Short-period Jovian Planet Transiting a Mid-M Dwarf” it revealed that it was the first known large exoplanet to exist orbiting a very small red dwarf star.
“Its parent star, TOI-5205, is only about four times the size of Jupiter. Yet it somehow managed to form a Jupiter-sized planet, which is quite surprising.” Shubham Kanodia, Carnegie Institution for Science astronomer who is the lead author of the paper, quoted from Carnegie Science.
Until now they themselves do not know how the pair of space objects can be formed. This is because this phenomenon is different from the existing understanding regarding the formation of planets that we know so far.
Kanodia also writes on the Pennsylvania State University blog about his findings. He refers to the exoplanet TOI-5205b as a “forbidden planet”.
“In context, a 0.3 percent mass ratio object around a Sun-type star would have a mass about 3 times that of Jupiter,” he wrote. At this mass, according to the conventional nuclear accretion theory of planet formation, it is difficult to create various celestial bodies.
However, such a theory does not apply to TOI-5205b, which is considered to have a very heavy mass, but is close to a star. “The presence of TOI-5205b expands what we know about the disks from which these planets are born,” Kanodia said.
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