Astronomers first measured wind speed on a brown dwarf

Astronomers first measured the wind speed on a brown dwarf. The technique, developed by researchers from the National Radio Astronomy Observatory, will measure wind speed on other stars outside the solar system, according to a study published in the journal Science.

Brown dwarfs are interstellar objects weighing from 13 to 80 Jupiter, in the nuclei of which there are reactions involving nuclei of deuterium and lithium. Such objects are more massive than planets but too small for thermonuclear reactions characteristic of stars to occur in their nuclei.

Researchers based on data from the Spitzer orbital telescope studied the brown dwarf 2MASS J10475385 + 2124234. The size of this object is comparable to the size of Jupiter, but it is about 40 times more massive than the gas giant. The dwarf is located 34 light-years from Earth.

Studying the data collected by the telescope allowed scientists to compose a model of the atmosphere of the object. Astronomers have discovered that the outer atmosphere of a brown dwarf rotates faster than its inside.

Brown dwarf

The wind speed on it is approximately 2293.315 km/h. This is significantly more than the wind speed on Jupiter, which is about 370 km/h.

Previously, astronomers led by Karina Persson discovered an unusual supermassive brown dwarf EPIC 212036875 with a mass of more than 50 Jupiters. It orbits around a star of spectral type F7 V and is located at a distance of about three astronomical units – in the zone of the so-called “desert of brown dwarfs”, where such objects are extremely rare.

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