'Rogue' extrasolar planetary-mass object detected

Cristina Cross
August 8, 2018

The planet is called rogue due to its lack of a parent star, having the distinction of being something between a planet and a brown dwarf, which is an object that has too great of a mass to be called a planet.

It was first detected using a radio telescope, the National Science Foundation's Karl G. Jansky Very Large Array.

"This particular object is exciting because studying its magnetic dynamo mechanisms can give us new insights on how the same type of mechanisms can operate in extrasolar planets - planets beyond our solar system". Instead, the 200-million-year-old planet rotates around the galactic center of the Milky Way in interstellar space.

The temperature on its surface is more than 1,500 degrees Fahrenheit. The team's analysis showed the planet's magnetic field is around 200 times stronger than Jupiter's, and this could help explain why it also has a strong aurora. Brown dwarves are hard objects to categorise they are too huge to be considered planets and not big enough to be considered stars.

The difference between a gas giant planet and a brown dwarf remains hotly debated among astronomers, but one rule of thumb that they use is the mass below which deuterium fusion ceases, known as the 'deuterium-burning limit, ' around 13 Jupiter masses. The first ever sighting of a Brown Dwarf happened as late as 1995.

Astronomers discovered a planet just beyond our solar system with many mysterious characteristics.

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A further study carried out previous year revealed that SIMP was part of a young group of stars. Not only its size is impressive, but also the fact that the planet is not orbiting any star.

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.

Auroras on Earth are created when charged particles from the Sun interact with Earth's magnetic field.

Astronomers have discovered a massive planet with a odd glow just outside the solar system, where it is just drifting without any kind of orbit.

Astronomer Gregg Hallinan of Caltech noted that the research "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".

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