Supporting the ‘disk instability’ hypothesis, which is different from the standard model… “Forming Planets in Different Ways”
[NASA, ESA, Joseph Olmsted (STScI) 제공/ 재판매 및 DB 금지] [email protected]
Large gas planets like Jupiter first collided and accumulate to form a larger core than Earth, and then a ‘core accretion’ model has been proposed as a standard.
Typical examples are Jupiter or Saturn formed at 5 to 10 times the Sun-Earth distance (1 au/astronomical unit).
However, large gas planets were discovered at 50-200 au far away from the stars, even though there were not enough planets to form a giant nucleus. The ‘disc instability’ hypothesis has been proposed and has been a subject of debate.
According to the National Aeronautics and Space Administration (NASA) Goddard Space Flight Center, an image of the formation of a Jupiter planet that supports this hypothesis was captured and published in the scientific journal Nature Astronomy.
The main character is ‘AB Aurigae b’, which is being formed in the disk of a protoplanetary system around a young star in the constellation Auriga, about 531 light-years away from Earth.
It is formed about 13.7 billion km away from AB Aurigae, which was formed only about 2 million years ago.
The solar system, which is now 4.6 billion years old, was in the midst of planet formation at this time.
AB Aurigae b was analyzed to have a mass of 9 times that of Jupiter, and it is estimated that it was formed through gas decay because it would take a long time even if the planets accumulate and form a nucleus at such a distant distance.
Using the Hubble Space Telescope and the Subaru Telescope on the summit of Mauna Kea, Hawaii, a team led by astrophysicist Dr. Tane Curry at NASA’s Ames Research Center observed AB Auriga b, forming from a disk of dust and gas around a young star.
[Science: NASA, ESA, Thayne Currie (Subaru Telescope, Eureka Scientific Inc.); Image Processing: Thayne Currie (Subaru Telescope, Eureka Scientific Inc.), Alyssa Pagan (STScI) 제공/ 재판매 및 DB 금지] [email protected]
In the wake of the planet, a vortex of disk material, a phenomenon predicted by the disk instability hypothesis, was observed.
“Nature is smart and can form planets in a variety of ways,” Curry said.
“It shows strong evidence that some large gas planets can form from disk instability,” said Alan Bos of the Carnegie Institute for Science. explain things,” he said.
In addition to AB Auriga b b, the research team suggested that two planetary candidates orbit farther out, 430-580 au.
The research team said that AB Auriga b was observed at an early stage of planet formation, which has important implications for broadening our understanding of the evolution of large gas planets.
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