This object is right at the boundary between a planet and a brown dwarf, or 'failed star, ' and is giving us some surprises that can potentially help us understand magnetic processes on both stars and planets.
It was first detected using a radio telescope, the National Science Foundation's Karl G. Jansky Very Large Array.
It also boasts scorching surface temperatures of around 1,500 degrees Fahrenheit.
They now believe it's a much younger object and its mass is, therefore, smaller than originally thought - meaning it could theoretically be classified as a planet in its own right. Finding a solitary planet - called a "rogue" planet - is more hard, but researchers just managed to spot one using a radio telescope, and it's a real weirdo. The discovery marks the first time radio observations and magnetic field measurements have been made of such a body and opens the door for future insights into exploring exoplanetary magnetic fields.
Brown dwarfs, explains the NRAO, are celestial objects that are too big to actually be considered planets, yet not big enough to sustain the nuclear fusion that keeps stars alive in their cores. It has a surface temperature of about 825 degrees Celsius.
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Artist's conception of SIMP01365, an object with 12.7 times the mass of Jupiter, but a magnetic field 200 times more powerful than Jupiter's.
The Caltech team that originally detected its radio emission in 2016 had observed it again in a new study at even higher radio frequencies and confirmed that its magnetic field was even stronger than what they had measured the first time. The auroras on Earth are caused by our planet's magnetic field interacting with the solar wind. One theory is that auroras happen when a planet or moon interacts with the brown dwarf's magnetic field.
Such a strong magnetic field "presents huge challenges to our understanding of the dynamo mechanism that produces the magnetic fields in brown dwarfs and exoplanets and helps drive the auroras we see", said Gregg Hallinan, of Caltech.
When astronomers are searching the depths of space for new objects it's typically easier to find undiscovered planets if they're orbiting a star.
The findings appear in the Astrophysical Journal Supplement Series.