- Tram Ho
Located more than 1,000 light-years from Earth, KIC 8462852 is one of the stars that has puzzled astronomers since it was first observed through the Kepler mission data. 50% larger and 1,000 degrees hotter than the Sun, KIC 8462852 is also known as the Tabby star, which is named after Tabetha Boyajian, an assistant professor at Louisiana State University’s Department of Physics and Astronomy.
For some reason, the brightness of the KIC 8462852 constantly changes abnormally and unpredictably. For example, the light emitted from KIC 8462852 often suddenly dims for a few days or a week. In particular, there is a time when the level of light emitted from the star KIC 8462852 sometimes decreases to 15-22%.
Classified as F (relatively hot) star, KIC 8462852 should have maintained constant brightness. The short and long variation in its brightness is said to be absurd. Notably, out of 150,000 Kepler telescope stars observed, only at KIC 8462852 this strange phenomenon happened.
Located more than 1,000 light-years from Earth, KIC 8462852 is one of those stars that have always confused astronomers.
This led scientists to come up with the most plausible explanation: Something has eclipsed this star. Accordingly, some scientists believe that the star KIC 8462852 has been surrounded by a large number of comets. It was the tail of these comets that created a huge amount of dust that obscured a large part of the light of KIC 8462852. Others claim that the aliens have built a giant structure around KIC 8462852 to harness the energy of this star.
However, a recent discovery is believed to be able to solve the ongoing mystery of KIC 8462852. Accordingly, KIC 8462852 appears to have a companion star, which can contribute to reducing the abnormal brightness of the it.
Discovered by a team of astronomers at the University of Arizona, this companion star was named KIC 8462852 B. It is a red dwarf star and has a mass equal to 0.44 times the size and size of 0.45 solar times. In the binary system, the two stars are 880 AU apart, which is 880 times the average distance between Earth and the Sun.
Some theories suggest that the aliens have built a giant structure around KIC 8462852 to harness the energy of this star.
According to the researchers, with such a wide orbit, the KIC 8462852 B is unlikely to have any direct effect on the brightness of the KIC 8462852. But it could still play a role in the mysterious fluctuations of the bigger star. For example, the presence of two stars in close proximity can disrupt the orbits of the planets. Even the gravitational interaction of the two stars can stretch and tear the planets, leading to the appearance of asteroid rings.
However, the above scenario has not yet received the consent of some scientists. At such wide distances, the two stars will have extremely long orbits, and the observations made are insufficient to describe this orbit. KIC 8462852 B could be an ejected star; or two stars could be members of a moving star group.
The researchers believe that a binary star system is the most likely explanation for their measurements of two stars. However, future measurements of this pair will be needed to better understand their relationship. This can help confirm or rule out the role of the KIC 8462852 B for the erratic brightness of the KIC 8462852.
Refer to Science Alert
Source : Genk