Brown dwarves are also known as stellar dwarves and can rotate at extremely high speeds. Scientists know that a brown dwarf can rotate at speeds of up to 200,000 miles per hour, but researchers think there may be a limit to how fast it rotates. NASA scientists used data from the Spitzer Space Telescope to determine the fastest three brown dwarf stars ever discovered.
The three dwarves are believed to be brown Approaching Rotational speed limit for all brown dwarves. If they weave faster, researchers believe they will split apart. The fast-rotating triangular brown dwarfs are roughly the same diameter as Jupiter, but they are between 40 and 70 times larger. Each of them rotates completely once every hour.
NASA researchers say the next fastest brown dwarfs rotate only once every 1.4 hours. For comparison, Jupiter rotates every 10 hours. The three largest brown dwarves rotate at over 60 miles per second, or about 220,000 miles per hour, depending on size. Brown dwarfs were initially discovered by a Two Micron All Sky ground survey running until 2001.
Once formed, brown dwarves rotate, and when they cool and contract, they rotate faster. Rotation rate was measured for about 80 brown dwarves with the rate varying from less than two hours to tens of hours.
The brown fast dwarf trio in the latest study have roughly the same rate of rotation, and scientists don’t think that’s a coincidence. The speed of rotation cannot be attributed to forming brown dwarves together or being at the same stage of their development because they are all different physically. Scientists believe that the trio are all at their maximum rotational speed, and after exceeding their current velocity, they will separate.