Sunday , October 17 2021

Found 6 Super Worlds in light years! Will be the second nearest exoplanet to the solar system | TechNews


Applause! After a half-century discussion, the research conducted by the Carnegie Institute of Science in the United States lasted 20 hours, and finally proved that there was a super-earth named Barnard Star b, only 6 light-years away from the Earth. 99%. When other independent studies are successful with other detection methods, Barnard Star b will become the second external planet closest to the solar system.

Today, the star system closest to the solar system is the three-star system of the Southern Gate II (Alpha Centauri, also known as Alpha Centauri), about 4.3 light-years away, and the South Gate II closest to the Earth. system. Proxima Centauri's Proxima Centauri orbital period is only 11.86 days.

Now, the astronomical team at the Carnegie Institute of Science has compiled 20 years of research data, and we have a surprise that we have a 99% chance of discovering a new world: a super-world Barnard star, just 6 light-years away. (Star of Barnard b or GJ 699 b)!

Barnard's star, as his name suggests, is Barnard's Star, a small red dwarf star, located about 14% of its solar mass, just 6 light-years away from the Earth, near the constellation's beta star. . This is recognized by its unique features. For example, in all known stars, it is sometimes the fastest star called Runaway Star and motivates itself. Ursa is 1 times faster than Major's flying star.

Parent The imaginary picture of the artist's super-world "Barnard Star b" around the top star. (Source: ESO)

During the 1960s and 1970s, the astronomer Peter van de Kamp once claimed that Barnard Star should have a gigantic giant planet because Barnard discovered the perturbation of his movement. In about 230 days, Barnard's star will swing and suggest that the giant planet might be affected by the gravitational force it exerts in orbit. Some astronomers accepted their claims, but they observed opposition to the allegations of Peter van der Camp, including another group of astronomers, George Gatewood and Heinrich Eichhorn.

So far, the team at the Carnegie Science Institute has a high confidence to support Peter van der Camp's point of view.

The team used the radial velocity method to detect the planets using a total of seven instruments, such as the ESO of the 3.6-meter telescope's High Precision Radial Speed ​​Planet Seeker (HARPS) and the UV of the Very Large Telescope. Ultraviolet and Visual Echelle Spectrograph (UVES), CARMENES spectrometer of the European Large Telescope.

The principle of the radial velocity method means that if the planet is in orbit of the star, and its mass is large enough, planetary gravity is sufficient to cause a slight rotation to the main star, not only that the gravitational force of the star affects the planet, but also the gravity of the planet. It affects the stars.

The newly discovered Barnard star b orbit period is 233 days, which coincides with the perturbation period of the star of Barnard, which estimates that the mass of this giant planet is at least 3.2 times the Earth and the surface temperature is minus 150 ° C. The energy emitted by the Nader star is only 0.4% of the sun, so Barnard star b will be the closest second to Earth, but the degree of habit may still be better than the nearest neighbor.

The test must also be approved by other independent research groups such as the Lingri method, but the Carnegie Institute of Science team verifies that the planet is 99% accurate. The new generation of space and ground telescopes will be commissioned after the 2020's, such as the James Webb Space Telescope, and some of them can directly display the Barnard Star B & # 39; s and measure the spectrum of NASA's Wide Area Infrared Sky Telescope (Wide Area). . Infrared Survey Telescope (WFIRST), ESA's Gaia, etc.

The new paper was published in Nature magazine.

Note: A star's own movement refers to the change in the position of a star in time relative to the center of the mass of the solar system over time.

(Source: European Southern Observatory)

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