Astronomers have suggested that sometime in 2083, a star as bright as Sirius could suddenly appear in the night sky,media reported. According to 130-year-old telescope photos, astronomers Bradley E. Schaefer, Juhan Frank and Manos Chatzopoulos of Louisiana State University’s Department of Physics and Astronomy concluded that the binary system V Sagittae (V. Sge) is located 1,100 light-years away in Sagitta, which could eventually become a supernova because its companion star could be swallowed up by the main star, the White Dwarf.
Currently, because the Variable Brightness of V Sge is only about 9.6, it is almost invisible in medium-sized telescopes and not visible to the naked eye. However, a study of photographs of stars collected since 1890 showed that the brightness of the two stars increased tenfold or 2.5 orders of magnitude between the early 1890s and the last decade.
This is important because V Sge is an unusualextreme example of a dynamic variable star (CV). These are a system of stars consisting of two or more stars, where normal stars are in the orbit of a binary star orbiting a white dwarf. Over time, the gravitational pull of a white dwarf absorbs the mass of a normal star, which gathers on the surface of the white dwarf.
According to Schaefer and Frank, V Sge is 3.9 times larger than its companion star and 100 times brighter than any other known CV. This means that it is producing a powerful solar wind, which marks the beginning of the spiral of the two stars and then a supernova.
“We now have a strong forecast for the future of V Sge,” Schaefer said. Over the next few decades, the star will glow rapidly. Around 2083, its accretion rate will increase dramatically, with large amounts of material spilling onto white dwarfs at incredibly high rates, and burning them off. In the final days of the death spiral, all the mass from the companion star will fall on the white dwarf and produce an oversized wind from the merging star, which looks as bright as Sirius and may even be as bright as Venus. “
“In anticipation of the rapid decay of the orbit, The fate of V Sge is already destined. The key and simple physics originated from V Sge, which is expected to spiral and increase brightness at a rapid rate over the next few decades. Inevitably, this spiral will reach an orgasm, with most of the gas in normal stars falling into white dwarfs, and all of the mass decline in the last few weeks and days will release huge gravitational potential seamounts, driving unprecedented stellar winds and leaving the system only cooler than the supernova’s peak. “
When V Sge reaches the end, its brightness will increase within a month as the two stars merge, and at peak brightness, it is estimated that it will be the brightest star in the Milky Way. Finally, the two stars will form a star, consisting of a degraded core of white dwarfs, with a hydrogen-burning layer and a large layer of hydrogen on top. Although the calculation estimates that the event will occur around 2083, the lack of accurate data means that the margin of error is .16 years, so the event could occur as early as 2067 or 2099.
“So the V Sge looks surprisingly bright in the night sky,” says Schaefer. This is much brighter than the brightest new star ever (-0.5) in more than a century, and the last time the “guest star” appeared was a supernova discovered by Kepler in 1604. Now people all over the world can know that there will be a wonderful guest star shining in the sky in the future. “