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Tuesday, July 25, 2017

Discovered brown dwarf with the shortest day


Using the Arecibo radio telescope, the American astronomer, Matthew Ruth and his Polish counterpart Alexander Wolman discovered brown dwarf J1122+25 which completes one full rotation around its axis in just 17 minutes — a record for objects of this type. Brown dwarfs constitute the heavenly bodies, as the size and terms of reactions occurring inside representing something between a star and a planet, although I’ll take them all to the stars.

Artistic impression of a brown dwarf. Illustration — wikipedia.org

J1122 + 25 (full name — WISEPC J112254.73 + 255021.5) is an ultra-cold brown dwarf — one of the six most cold discovered today. Experts note that the exact speed of rotation still to be determined — it may be 17, 34 or 51 minutes. However, unsurpassed and quite an amazing result even in the third case. Celestial body, weighing 35 times larger than Jupiter, located in Leo constellation and the distance from it to Earth is about 55 light years. Although by cosmic standards it’s fairly close, “to the naked eye or even with an optical telescope to see it would be impossible, however, the radio telescope had allowed them to capture the emitted flash of radiation. Most likely, the celestial body has a powerful magnetic field, which scientists define yet.

As the researchers note, so exciting the speed of rotation of the brown dwarf is quite difficult to explain from the point of view of existing models of rotation of such bodies, therefore, the opening can serve as food for thought to many theorists, the authors of the study published in the scientific publication in the Astrophysical Journal Letters.

Radio telescope, installed at the Arecibo Observatory not far the largest in the world uses a single aperture. Using this radio telescope was formerly discovered a pulsar, PSR 1257+12, which, upon further study, they discovered the first planet outside the Solar system.

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