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When it comes to the detection of extrasolar planets, humanity is increasingly surprised. Many are the planets that have been discovered, but none have so shocked the community as the discovery of a giant planet orbiting a subgiant star so closely that it should have disappeared. This giant planet would have a mass 50 times greater than that of the earth and its radius is equivalent to 8 terrestrials.
The detection of extrasolar planets is increasingly surprising
How does this giant planet survive?
Despite its gross size, what has surprised the scientific community the most in this discovery is that the planet revolves around a subgiant star in a period of only 4.6 days and should therefore have been destroyed by the great tides by now.
An international group of astronomers made the discovery and has announced that because of the proximity of its giant star, it should have disappeared, but it is not so and, in addition to having survived against all odds, has the record, so far, the shortest duration of time on the planet in orbiting a star of the dimensions of a subgiant.
Its assigned name is K2-39b and it was discovered by the well-known Kepler mission, sent by the US space agency. Its extraordinary characteristics were confirmed by scientists from the University of Aarhus in Denmark, using high precision radial spectrographs and different telescopes.
Humanity has achieved the detection of unknown extrasolar planets
A planet out of the ordinary.
The monitoring carried out from the fuecrucial earth to be able to confirm that, in fact, it was a real extrasolar planet that had just been discovered. The group of scientists made some measurements of radial velocity in order to know the trajectory of the star generated by the force that the planet exerted on it.
Thanks to this data the mass was known: about fifty times larger than the Earth and its radius is equivalent to about eight earthly radii. But what surprised the researchers most is the planet’s orbit around the subgiant star and the short period of time it takes for it to be completely destroyed by the tides.
Currently there are only two main theories that attempt to explain the lack of subgiant stars with orbiting planets; one mentions that these are destroyed by the seas caused by the evolution of the star and its increase in size.
The second talks about the highest masses that have been observed and which evolve in comparison to the usual masses of the star.
How is that possible? So far there is no real explanation.