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Brown dwarfs are intermediate objects between planets and stars: 13-80 times more massive than Jupiter, but not massive enough to trigger thermonuclear reactions of hydrogen in their nuclei.
The smallest dwarfs are barely larger than Jupiter and their temperature is around 700 kelvins, around 400 degrees Celsius.
© ESO
The gravity of the most massive compresses them to a radius less than that of Jupiter and the temperature rises to 2,700 kelvins. These latter objects emit a rich red light. In general, brown dwarfs are particularly pale, which makes them difficult to detect. Now, for the first time, a brown dwarf has been detected solely by radio radiation.
Gas planets, such as Jupiter, have a very strong magnetic field in which electric particles start spiraling and emit radio waves. Brown dwarfs also have a strong magnetic field; Radio radiation from known dwarfs has been observed multiple times in recent years.
A recently discovered object, BDR J1750 + 3809, captured by 144 MHz polarized radiofrequency radiation; subsequent infrared observations confirmed that it was indeed a brown dwarf.
The mass of the object is about 25 times that of Jupiter, so it is one of the smallest brown dwarfs; True, its radio radiation is about a hundred times stronger than previously detected objects of similar size. This can be a sign of interaction with a mate or spherical radiation (jets directed towards us). While this discovery is the only one so far, there will certainly be more.
The results of the “arXiv” study.
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