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The 3-star extrasolar planet is itself a separate star

BingMag.com The <b>3-star</b> <b>extrasolar</b> <b>planet</b> is <b>itself</b> a <b>separate</b> star

In exceptional cases, the researchers reversed their discovery of a three-star extrasolar planet, stating that they had observed a completely separate star./p>

Finding alien worlds far away from the solar system is a delicate task. Although the tools of astronomers have greatly improved since the first discovery of extrasolar planets in the 1990s, there are still challenging efforts; For example, finding small objects hundreds of light-years away from their host stars. So it is not surprising that sometimes extrasolar planets discovered are not really planets.

This is the fate that befell the alleged planet HD 131399 Ab, which scientists once thought had three suns. According to a study published in the April 15 issue of the journal Science, when astronomers revisited the planet, they found that it was actually something completely different and distant that could only be seen in the background of a star system. It looks like an extrasolar planet. So now astronomers who first found the planet are making a comeback. Is located and consists of three stars; A type A white main star with about twice the mass of the Sun that astronomers thought orbited HD 131399 Ab and two smaller companions.

Scientists first reported HD 131399 Ab about six years ago. This newly discovered universe, the size of Jupiter, attracted a great deal of attention at the time because it was a world with three suns. From the point of view of an astronomer, however, this discovery was interesting in that it was directly imaged; Instead of detecting the planet with a trace of dimming or vibration in the main star, scientists observed it directly with their telescopes.

  • Scientists have probably discovered a planet orbiting three stars. is not. In particular, scientists analyzed the parallax of objects to see how much the object in question was moving against a stellar background, as seen in different parts of Earth's orbit. This study by independent astronomers showed that the hypothetical planet and star system are not at the same distance from Earth. BingMag.com The <b>3-star</b> <b>extrasolar</b> <b>planet</b> is <b>itself</b> a <b>separate</b> star

    Mass HD 131399 Ab from the point of view of a large European observatory
    Credit: ESO/K. Wagner et al

    Subsequent measurements by the original explorers of the planet also confirmed this finding. In fact, what scientists thought was a planet is a very fast-moving object in the background, several light-years away from the star system 131399.

    "This must be a very red star, probably a giant "This red color made the star look deceptively like a planet," said Kevin Wagner, an astronomer at the University of Arizona and one of the discoverers of HD 131399 Ab.

    In addition, this distant star appears to be moving abnormally fast, which is why its speed appears to correspond to that of a much closer star system. According to scientists, this difference indicates that some phenomena have given force to the star. "Each of these is a rare event in its own right," Wagner said, according to them. "The combination of these two properties is unlikely to lead us to the wrong classification of background mass as an extrasolar planet."

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    Now, according to researchers, although they are not aware of any other example in which a red star or other high-velocity object has been mistaken for a closer extrasolar planet, as the HD 131399 Ab study shows, This is definitely possible.

    Cover photo: Graphic design from HD 131399 Ab
    Credit: ESO/L. Calada/M. Kornmesser


Source: Space

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