Astronomers used NASA satellite data to hunt the planet, TESS, to make an unusual discovery: A planet about the size of Neptune orbits extremely close to its star. The TOI-1
Hot Neptunians are rare, because although astronomers often find planets the size of Jupiter or slightly larger than Earth in orbits near their stars, very few planets the size of Neptune have been found so close. Astronomers believe this could be due to atmospheric losses as planets the size of Neptune, close to their stars, lose gases from their atmosphere and quickly erode into smaller planets the size of Earth.
This led to a phenomenon that astronomers call the Neptune Desert, an area around a star where planets the size of Neptune are almost never found.
"Although planets the size of Neptune orbiting the Sun stars, they are quite abundant, they are very rare in short orbital periods, "researcher Dr – said in his report, Matthias Diaz of the Universidad de Chile. 2-4 days, and the term "Neptune Desert" was coined to explain this weak
With the discovery of TOI-132b, researchers have discovered a hot Neptune sitting right on the border of this Neptune desert. The star orbiting the planet, TOI-132, is a G-type dwarf star at 6 billion, and is a little smaller and less massive than our sun.
To find out why TOI-132b survived, but other hot Neptunians didn't have it, scientists looked at the planet's properties. because it is about 23 times the mass of Earth and has a rocky core that makes it dense. This helped the planet's atmosphere survive, which probably prevented it from eroding into a smaller form. "The survival of the planet's atmosphere can probably be understood on the basis of its large mass of nucleus, as well as its incompatibility with being either 100% rock or water," the researchers say in their paper.
The document is available for reading at the arXiv archive prior to publication and will be published in the Monthly Notices of the Royal Astronomical Society.