‘Forbidden’ Planet in ‘Neptunian Desert’ Around its star – Discovered

Eddie Gonzales Jr. – MessageToEagle.com – An exoplanet, smaller than Neptune with its own atmosphere, has been discovered in the Neptunian Desert by an international team of astronomers.

The rogue planet was identified in the new research, led by Dr Richard West including Professor Peter Wheatley, Dr Daniel Bayliss and Dr James McCormac from the Astronomy and Astrophysics Group at the University of Warwick.

NGTS-4b, also nick-named ‘The Forbidden Planet’ by researchers, is a planet smaller than Neptune but three times the size of Earth. It has a mass of 20 Earth masses, and a radius 20% smaller than Neptune, and is 1000 degrees Celsius. It orbits around the star in only 1.3 days — the equivalent of Earth’s orbit around the sun of one year.

It is the first exoplanet of its kind to have been found in the Neptunian Desert.

The Neptunian Desert is the region close to stars where no Neptune-sized planets are found. This area receives strong irradiation from the star, meaning the planets do not retain their gaseous atmosphere as they evaporate leaving just a rocky core. However NGTS-4b still has its atmosphere of gas.

Researchers believe the planet may have moved into the Neptunian Desert recently, in the last one million years, or it was very big and the atmosphere is still evaporating.

“This planet must be tough — it is right in the zone where we expected Neptune-sized planets could not survive,” Dr Richard West, from the Department of Physics at the University of Warwick, said in a press release.

It is truly remarkable that we found a transiting planet via a star dimming by less than 0.2% — this has never been done before by telescopes on the ground, and it was great to find after working on this project for a year.

“We are now scouring out data to see if we can see any more planets in the Neptune Desert — perhaps the desert is greener than was once thought.”

NGTS (Next-Generation Transit Survey) is situated at the European Southern Observatory’s Paranal Observatory in the heart of the Atacama Desert, Chile.

Paper

Written by Eddie Gonzales Jr. – MessageToEagle.com Staff Writer