Scientists from Australia have analysed a group of ultracold brown dwarfs that have radio emission. These are very rare stars in our Universe. They account for about 10 per cent of cinnamon dwarfs.
Here's What We Know
Researchers were able to determine which of the ultracold brown dwarfs that emit radio waves is the coldest. It turned out to be a star with the catalogue number T8 Dwarf WISE J062309.94-045624.6.
Our hero is about 37 light years from Earth. Scientists at the California Institute of Technology discovered it 12 years ago. As it became known, the temperature on the surface of T8 Dwarf WISE J062309.94-045624.6 is only 425 degrees Celsius, i.e. 10 times lower than the Sun.
The star is tens or even hundreds of times smaller than the Sun. Scientists were unable to determine the exact mass of T8 Dwarf WISE J062309.94-045624.6, but found it to be 4-44 times larger than Jupiter. The brown dwarf has a radius of 0.65-0.95 the radius of Jupiter.
The rarity of such stars is the presence of radio emission. Usually brown dwarfs don't have it. This is because the dynamics of such stars do not create magnetic fields.
Source: Science Daily