WISE has found the first brown dwarf

The green dot in the middle of the picture — brown dwarf WISEPC J045853.90 643451.9. Photo NASA / JPL-Caltech / UCLA.

Studying the data transmitted to Earth infrared telescope WISE, astronomers found the first detector telescope captured a brown dwarf.

Brown dwarfs are balls of gas mass, as a rule, ten times more than the largest planet in our solar system, Jupiter. As with other stars, brown dwarfs can occur thermonuclear processes, but their weight is still too low to start the reaction conversion of hydrogen into atoms of helium, which is the main condition for the life of a full-fledged star.

The diagram above photo of the blue "diamond" of stars you can see a green "emerald" — this is a brown dwarf, which is located at a distance of about 18-30 light-years from Earth. According to the scientists, WISEPC J045853.90 +643451.9 is one of the coolest brown dwarfs known to astronomers: the temperature to around 600 Kelvin, while the temperature of the sun's surface reaches 6000 Kelvin. Why are the pictures WISE brown dwarf looks like a green dot? Amy Meyntser, deputy project scientist for WISE NASA's Jet Propulsion Laboratory, explains, "Brown dwarfs in the pictures look like WISE green" emeralds "because the methane in their atmospheres absorbs the infrared part of the spectrum, which WISE in the color blue. Brown dwarfs themselves are too weak to WISE, to emit in the red part of the spectrum. Thus, the telescope can only see part of the spectrum, which is indicated in green in the pictures. "

WISE infrared telescope was launched on 14 December 2009. On the machine was put into orbit a rocket Delta II. Telescope orbits the Earth at an altitude of about 525 kilometers. A wide range of unique WISE, allowing him to see how small asteroids, and distant clusters of galaxies, makes the device a unique instrument, working in the infrared. He is a pilot for other telescopes, such as the "Hubble" and "Spitzer", pointing out to them the most interesting objects of study.

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