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Astronomers looking for supernovae find an object whose behavior is more surprising than the star Tabby.
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Astronomers have discovered a strange bright star resembling a Tabby star, in which case the presence of the extraterrestrial mega structure like the Dyson sphere was supposed.
The idea of megastructure, proposed for the first time in 2015, was then refuted by the data, suggesting that the strange flicker is caused by dust particles covering the starlight. The behavior of a new star, it seems, is also not associated with extraterrestrials. However, astronomer Roberto Saito of the Federal University of Santa Catarina in Florianopolis, Brazil, says that it is extremely unusual. With his colleagues, the scientist wrote an article about it published in the arXiv.org preprint database.
"We do not know what kind of thing it is," says Saito. And it's fun.
Artificially colored the sky zone from the center of VVV-WIT-07 / © R. K. Saito et al.
Around the star can turn garbage periodically obscuring the light, but Saito's colleagues say that to determine this requires more observations. The researchers were looking for a supernova – a star, a flare in the explosion. They drew attention to the object in the VISTA telescope in the Atacama Desert (northern Chile). They were part of a larger study of the galactic center, called Variables in Via Lactea, or VVV.
Instead of flash, the star is suddenly darkened. The team named the VVV-WIT-07 object (WIT is the acronym for "What is this?", In English – "What is it?").
From 2010 to 2018, the brightness of the stars then increased, then decreased, without reason. This is reminiscent of the Tabby star, only the light of the VVV-WIT-07 has been reduced to 80%, while the brightness of Tabby has only decreased by 20%.
A team of astronomers intends to continue to monitor the star with larger telescopes, such as a 8.1 meter Gemini telescope, or ALMA, located in Chile.
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