Astronomers have detected a giant rogue planet circling in space

Astronomers using the National Science Foundation’s Karl G. Jansky Very Large Array (VLA) have discovered new evidence of a giant rogue planet outside our solar system. The planet which is expected to be 12 times the size of Jupiter, traveling without any sort of orbit or mother star.

From the radio astronomy observatory, scientists have been able to capture and study its magnetic activity. In addition, he possesses surprisingly strong magnetic power and a “thug”.

Melodie Kao, who led the study as a graduate student at Caltech, said: “This object sits right on the border between a planet and a brown dwarf, or ‘failing star’, and has surprises in store for us that can potentially help us understand the magnetic field process on stars and planets.

The strange object in the latest study, called SIMP J01365663 + 0933473, has a magnetic field more than 200 times stronger than that of Jupiter. The object was initially detected in 2016 as one of five brown dwarfs that scientists studied with the VLA to gain new knowledge about magnetic fields and the mechanisms by which some of the colder objects can produce strong emissions. radio. The masses of brown dwarfs are notoriously difficult to measure, and at the time, the object was thought to be an ancient and much more massive brown dwarf.

Last year, another team of scientists discovered that SIMP J01365663 + 0933473 was part of a very young group of stars. This means that it was in fact so much less massive that it could be a free-floating planet – only 12.7 times more massive than Jupiter.

Scientists estimated the object’s temperature to be around 825 degrees Celsius or over 1,500 degrees Fahrenheit.

At the same time, the Caltech group which initially recognized its radio show in 2016 saw it again in another examination at significantly higher radio frequencies and claimed its magnetic field was much more anchored than expected.

Kao said, “When it was announced that SIMP J01365663 + 0933473 had a mass near the burn limit of deuterium, I had just finished analyzing its latest VLA data. The VLA observations provided both the first radio detection and the first measurement of the magnetic field of a possible planetary mass object beyond our solar system.

“This particular object is exciting because studying its dynamo-magnetic mechanisms can give us new insight into how the same type of mechanisms can work on extrasolar planets – planets beyond our solar system. believe that these mechanisms can work not only in brown dwarfs, but also on gas and terrestrial giant planets. ”

Gregg Hallinan, of Caltech, said: “Such a powerful magnetic field” presents enormous 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 ” ,

“Detecting SIMP J01365663 + 0933473 with the VLA via its auroral radio broadcast also means that we might have a new way of detecting exoplanets, including the elusive thugs that don’t orbit a parent star. “

The results are reported in the Astrophysical Journal.


Source link

Arline J. Mercier