The artist GJ 3470b escapes the impression of gas escaping its parent star. Image: NASA, ESA and D Player / STScI
Astronomers have found an exoplanet to evaporate faster than ever before. Exoplaneta, called GJ 3470b, is located in the Cancer constellation, and has been discovered by a national astronomer group using the Hubble Space Telescope.
Until now, most exoplanet finds by astronomers are more than just Jupiter's large planet or super-hot Earth (with more than 1.5 times the Earth's diameter). These are hot, because they are very close to the host's star. Astronomers have seldom found a Neptune-like exoplanet hot as Jupiter and Earth fall.
But the GJ 3470b is a "hot Neptune." It is 4,3 times higher on the ground than 3,7 million km from its star. Scientists estimate that GJ 3470 has lost 35% of its total life over the course of its life and lost 10 billion grams in the second.
After a few years, astronomers discovered another "Neptune Heat", called GJ 436b, whose evaporation was 100 times smaller than GJ 3470b.
"GJ 3470 has lost most of its mass beyond the planet we have seen until now, it's just half a million years away from the planet," said David Sing, paper editor and Bloomberg Distinguished Professor Johns Hopkins University.
GJ 3470b consists of the "edge of the beast desert", which receives intense radiation from the star's star. These radiations heat up the atmosphere that the massive cloud of gas forms around the exoplanet. This cloud eventually escapes into space, reducing the atmosphere to a little as a deflation balloon.
According to the research, GJ 3470b is evaporating faster than the GJ 436b. The rapid rate of evaporation could be one of its smaller densities, that is, while GJ 3470b "gravitationally does not heat up to the atmosphere."
Also, the star of the GJ 3470b host is younger than the star of the GJ 436b host, since GJ 3470b receives much more radiation than GJ 436b.
An Exoplanet Panchromatic Comparative Panasonic (PanCET) program was conducted to measure the 20 ultraviolet, optical and infrared exoplanet atmospheres used by the NASA Hubble Space Telescope.
The findings of the research are published in the Journal of the journal Astronomy and Astrophysics.