The Hubble Space Telescope has discovered a supermassive gas planet that is forming in a new way rather than a standard model.
The ‘core accreption’ model has been proposed as a standard for large gas planets like Jupiter, which are formed by accreting gas giants ranging from dust grains to rocks by colliding and accumulating a core larger than Earth. . Examples are Jupiter or Saturn formed at 5 to 10 times the Sun-Earth distance (1 au).
However, recently, a research team at the National Astronomical Observatory in Japan has captured a supermassive gas planet that is forming under conditions where there are not enough planets to form a gigantic nucleus and presented it as proof of the ‘disc instability’ hypothesis. The results of this study were published in the scientific journal ‘Nature Astronomy’.
The disk instability hypothesis is a theory that it may have been formed through the process of disintegration and fragmentation of a gas disk due to gravitational instability. Simply put, it is a top-down theory that protoplanets were formed when clouds of gas were pulled together by gravity. This contradicts the nuclear accretion hypothesis, which is a bottom-up central growth model.
The gas planet discovered by Hubble is AB Auriga b, about 531 light-years from Earth. It is forming in the disk of a protoplanetary system around a young star.
This gas planet orbits the young star ‘AB Auriga’, which is only about 2 million years old, at a distance of about 13.7 billion km. The research team explains that it takes a long time to form with the standard model, nuclear accretion theory.
The research team led by Dr. Thein Curry came to this conclusion by comparing the appearance of AB Auriga b as seen using the Hubble Space Telescope and the Subaru Telescope in Hawaii. In the wake of the planet, a vortex of disk material, a phenomenon previously predicted by the disk instability hypothesis, was also observed.
“Nature is smart and can form planets in a variety of ways,” said Curry. He added, “This study was possible thanks to the Hubble Telescope, which has accumulated data for a long time.”
Reporter Seo Hee-won, Electronic Newspaper Internet (email@example.com)