High-speed and high-speed solar planet discovered
An international team of scientists led by the DLR Institute for Planetary Research is classifying the newly discovered extraterrestrial “GJ367b”.
Among extrasolar planets, “GJ367b” is a flying weight. Half the mass of Earth, the newly discovered planet is one of the lightest of the nearly 5,000 exoplanets known today. It only takes eight hours to orbit its mother star. With a diameter of more than 9,000 km, GJ 367 b is slightly larger than Mars. At about 31 light-years from Earth, this planetary system is suitable for further study. The discovery shows how one can detect the smallest and smallest mass exoplanets and accurately determine their properties. It provides the key to understanding how Earth-like rocky planets form and form. A team of 78 international teachers led by Dr. Christine WF Lam and Dr. From Szilárd Csizmadia Institute for Planetary Research Of the German Space Center (DLR) in the journal Science.
GJ 367b, which orbits Earth only one-third of the day, belongs to the class of “high-speed runners” on extraterrestrials. “From an accurate determination of radius and mass, GJ 367 b can be definitively classified as a rocky planet,” says Kristine Lam. “In terms of size and composition, it is reminiscent of Mercury, so it belongs to the terrestrial planets. It brings research one step further in the search for ‘Second Earth’.
More precise exoplanet profiles are possible
A quarter of a century after the discovery of the first solar system, today, with the exception of other discoveries, the main focus is on the more precise characteristics of these planets. Today you can write the most accurate profile for most exoplanets. Many extrasolar planets were discovered using what is known as the transit system, which measures minimal differences in the brightness of a star as it passes in front of its star. The GJ 367 b was discovered using this method using a NASA space telescope Des (Transiting Exoplanet Survey Satellite).
The origin of small high-speed racers is not yet known
GJ 367b belongs to the group of “ultra-short-lived planets”, abbreviated USP, which orbits the Sun within 24 hours. “We already know some of them, but their origins are not yet known,” says Christine Lam. “By accurately determining the basic properties, we have an insight into how the system was formed and created.” After the discovery using the transit method, the star was examined spectrum from the ground, now using the radial velocity method. It measures how the frequency of the wavelengths of stellar light changes due to the gravity of a planet orbiting the star. Was with Harps, An instrument from the European Southern Laboratory (ESO) 3.6 meter telescope. From a combination of meticulous study and different estimation methods, the radius and mass were accurately determined: the radius was 72 percent of the Earth’s radius and 55 percent of the Earth’s mass.
Highest accuracy for radius and dimensions
By determining the radius and mass with seven and fourteen percent accuracy, scientists were also able to find out something about the planet’s internal structure: it is a low mass rocky planet, but it has a high density. Earth. “High density refers to the iron core,” said Dr. Chilard Sysmadia. “These properties are similar to those of Mercury, which differs from other landforms in the solar system in that they are largely centered in the proportions of iron and nickel.” However, as the planet orbits very close to its star, it will be very exposed. High radiation, 500 times stronger than Earth. This means that the surface temperature can be up to 1,500 degrees Celsius, the melting temperature of all rocks and metals. So GJ 367 b is definitely not “Second Earth”.
The parent star is a “red dwarf”
The mother star of the new Exoplanet, the red dwarf named GJ367, is only half the size of the Sun. This was favorable for the discovery because the orbiting traffic signal was particularly strong. Red dwarfs are not only smaller than the sun, but also cooler. This makes it easier to locate planets and classify them. They are one of the most common objects in our cosmic environment, so they are ideal targets for exoplanet research. Scientists estimate that red dwarfs, also known as “M stars”, have an average of two to three planets.
Dr. Christine Lam
German Space Center (DLR)
Planetary Research Institute, Extrasolar Planets and Atmospheres
Press release from the German Space Center (DLR) dated December 2, 2021
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