“We don’t know much about it,” said Brendan B ബller of the University of Texas at AustinGiant desireHow it is formed. “This is the first evidence of the importance of the planetary system on the planets. Our results open up a whole new area for this research.”
Astronomers have so far listed more than 4,000 exoplanets, but so far only 15 telescopes have been imaged directly. The planets are very distant and small, they are usually just a point in the clear picture.
The research team used Hubble’s latest technology to photograph the planet directly, opening up a new avenue for further planetary research, especially during the formation of the planet.
This giant exoplanet orbiting the orange dwarf PDS70 is named PDS70B. The orange dwarf is known to have two planets in a large star disk surrounded by dust and gas. The system is located in the constellation Centaurus, 370 light-years from Earth.
“This system is very exciting because we can witness the formation of a planet,” said Syfan, of the University of Texas at Austin. “This is the youngest real planet ever to be directly imaged by Hubble.” At the age of about five, millions of years later, the planet is still absorbing matter and accumulating matter.
Hubble’s sensitivity to ultraviolet light has the unique ability to monitor radiation emitted by very hot gases falling on the planet.
“Hubble’s observations allow us to estimate the speed at which planets gain mass.” Soushou fan added.
Adding ultraviolet observations, the research team first estimated the planet’s massive growth rate for the first time. In about five million years, the planet will have five times the mass of Jupiter. The current measured rate of accretion has plummeted: if this rate of accretion remained the same for about a million years, it would only increase by 1/100 of the planet’s mass of Jupiter.
On Monday, Fan and Bowler said that these observations were short-lived data, and that more data was needed to determine whether the rate of planetary accretion mass was increasing or decreasing. “Our measurements indicate that the planet is nearing the end of its formation.”
The young PDS70 system is filled with primitive dust, which will fuel the growth of planets throughout the system. Planet PDS 70B has its own gas and dust around it, which absorbs material from large stellar dust disks. The research team said that the magnetic field lines extend from the disk of the outer planets to the atmosphere of the exoplanet and extend to the surface of the planet.
“If this material enters the planet from a dust disk, hotspots will appear locally.” Saiphan explained, “These hotspots may be 10 times hotter than Earth.”
These areas glow violently in ultraviolet light.
These observations also provide clues about the gaseous planets that formed around our Sun 4.6 billion years ago. Jupiter was produced by the accumulation of falling material disks. Its main satellite will also be formed from the debris in the resource.
The results of this new study will be published in the Journal of Astronomy on April 29, 2021.
Acting Editor: Lin Yan #