The scientists first recorded” spot-hurricane “on a brown dwarf: previously it was only observed on planets. On why the “raging” substars told «Ghhauto.ru».
The unique cosmic phenomenon was observed using telescopes “Kepler” and “Spitzer” A team of US astronomers led by John Gizisa of Delaware University in USA. They vyvili that brown dwarf (substars) strong storm rages. The text of the study can be found in The Astrophysical Journal.
According to scientists, a strong storm similar to the Great Red Spot – a giant storm-anticyclone the size of 24-40 thousand. Km in length and 12-14 thousand. Km width (considerably larger than the Earth), observed on Jupiter for nearly 350 years. The Great Red Spot was discovered by the French astronomer Giovanni Cassini in the distant 1665.
Giant “spot-hurricanes” are not unique to Jupiter and the other gas giants. For example, we know the Great Dark Spot on Neptune.
Great Dark Spot on Neptune was discovered in 1989 by a spacecraft “Voyager 2″. It, like the Great Red Spot of Jupiter is an anticyclone, and is the size of the Earth (but constantly changes its shape and size). According to scientists, the Great Dark Spot of Neptune was a hole in the methane clouds of the planet.
According to the latest observations, the Great Dark Spot has disappeared by 1994. Although the storms often occur on planets in the brown dwarf they discovered for the first time. The test object – a W1906 + 40 – a brown dwarf of spectral type L.
Brown (or brown) dwarfs – objects that are no longer a planet, but has not yet become a full-fledged star. The temperature of brown dwarfs is in the range from 300 to 3000 degrees Kelvin. Unlike the stars, which themselves heated by internal fusion, brown dwarfs are constantly cool throughout life – in this case the larger the dwarf, the slower it cools down.
The brown dwarfs may have their own satellites.
interesting that brown dwarfs originally called black dwarfs, and were classified as dark substellar objects floating freely in space and with too little mass to maintain a stable fusion reaction. Currently, however, called black dwarfs, astronomers cooled and therefore do not emit (or low emissivity) in the visible range of white dwarfs. Black dwarfs are the final stage in the evolution of white dwarfs in the absence of accretion – the process of weight gain celestial body by the gravitational attraction of matter to him from the environment.
According to the researchers, the storm on the W1906 + 40 “has been going on for at least within two years, and possibly longer. ” Researchers concluded that the storm makes a complete revolution with substars nine hours.
W1906 + 40 is located 53 light-years from Earth. The size of the dwarf is about 90% of the size of Jupiter, the average brightness – only 0.02% of the brightness of the sun. The average temperature substars – only 2200 degrees Kelvin. However, according to scientists at a temperature in the atmosphere of the object can be formed clouds.
Researchers have suggested that instead of the rain in the atmosphere W1906 + 40 drop of salt, iron and sand.
W1906 + 40 was discovered in 2011 by an infrared space telescope WISE.
Scientists are not sure whether the storms on substars anomaly or is this a common phenomenon. John Gizis says that going to look like lasting storms and other substars and stars.
According to astronomers, when viewed at different wavelengths storm on the W1906 + 40 looks different.
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