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Exoplanet next to two cold stars can have a life
Astronomers have discovered signs of a potential exoplanet in a system of two stars failed . If confirmed, it will become one of the most closely located to our sun alien worlds, writes Space.com.
Last year, scientists using infrared telescope WISE found two failed star, also known as brown dwarfs. Binary system located at a distance of 6.6 light-years from Earth is the third closest system to our sun. It is further star Bernard, but closer Alpha Centauri. The system, dubbed Luhman 16AB, is officially classified as WISE J104915.57-531906. To date, our nearest exoplanet scientists believe Alpha Centauri Bb, which revolves around one of the star system Alpha Centauri. Size and weight it is very similar to Earth.
After careful examination of our new neighbors using a highly sensitive instrument FORS2 VLT telescope in Chile, a team of astronomers led by Henri Boffin of the European Southern Observatory (ESO) has found something interesting.
We measured the position of the two objects to within a few milliarcseconds. This is how to determine the location of a person in New York up to 10 centimeters, while in Paris, – explains Boffin.
Researchers found that each have a brown dwarf mass of 30-50 Jupiter masses. For comparison, the mass of our sun exceeds the mass of Jupiter is about 1000 times. Because of its low weight they turn around each other for 20 years.
Within two months of observation for binary system Luhman 16AB team Boffin noticed slight variations of the orbits of the two studied brown dwarfs. Scientists suggest that it is caused by the presence in the system of the third astronomical object, which can potentially exist extraterrestrial life. However, to confirm this will require additional observations.
It is likely that the closest to the Sun binary system formed brown dwarfs may be a triple star system – said Boffin.
While science knows only eight planets outside the solar system, orbiting brown dwarfs. All of them were discovered by gravitational microlensing or by direct observation. Mysterious planet in the system Luhman 16AB can become the first exoplanet discovered using astrometry.
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Tags: Extraterrestrial life , binary stars , Extrasolar planets .
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