EV Lacertae

EV Lacertae (short EV Lac), another name Gliese 873, is a variable star in the constellation lizard.

It is a red dwarf, whose mass is about one third the mass of our sun and having only one percent of their brightness. EV Lacertae is 16 light years from Earth and with an estimated age of 300 million years ago, still a young star that is noticed for a long time by radiation eruptions. These are indirectly the result of his low age because it still rotates rapidly and thereby strongly twisted the magnetic field at the surface. The radiation eruptions occur when the energy stored in the short-circuit ( reconnection ) of magnetic field lines is suddenly released.

The star was known by a massive radiation eruption on 25 April 2008. Maintains strong X-ray and gamma radiation from the eruption was of the two satellites, telescopes and Swift Wind registered. It was the strongest radiation outbreak, which has so far been observed in a normal star. Similar outbreaks astronomers previously only knew of neutron stars, but for normal stars such as EV Lacertae the eruption was unusually strong.

Swell

  • Individual star fifth size and darker
  • Lizard ( constellation )
  • Variable star
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