Binary Star Will Offer a Bright Spectacle By The End Of The Century

A binary star which is currently known as V Sagittae will explode in a spectacular way towards the end of the century. For now, the star, which is located in the Sagitta constellation, is hard to spot, even with the help of medium-power telescopes.

Close to 2083, the star will explode, and it will be as bright as Sirius, which is the brightest star on the night sky. Researchers believe that when the eruption takes place, V Sagittae will be the most luminous star in the Milky Way galaxy.

According to a lead researcher, the future of the star is quite clear. In the following decades, it will start to brighten at an accelerated pace. Around 2083 the accretion disk will reach a critical level, releasing a large amount of mass onto the white dwarf.

Binary Star V Sagittae Will Offer a Bright Spectacle By The End Of The Century

During the final days, the entire mass of the companion star will be consumed by the white dwarf, leading to the high-power wind. When the two stars start to merge, they will appear to be as bright as Sirius or even Venus.

The binary star is a member of the Cataclysmic Variable class. In this case, an ordinary star follows a binary orbit around a white dwarf star. Over time, the mass of the regular star is consumed by the white dwarf. Current data infers that V Sagittae is the most extreme case, as it is approximately 100 times more luminous in comparison to other CVs.

While the unusual properties of the star system were quite surprising, the researchers didn’t realize that the binary orbit is affected by a fast in-spiraling phenomenon. The star has become more luminous at an exponential rate, and it thought that only in-spiraling could explain the amount of mass that reaches the white dwarf. At the peak of the event, the two stars will merge into a single one.

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