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Monday, February 19, 2018

Astronomers explained the anomaly “Star Tabby”

In 2015, Yale astronomers led by Tabetai Boyajian (Boyajian Tabetha), in whose honor a distant star KIC 8462852 got its informal name showed that from time to time she much something is obscured, losing in brightness sometimes more than 20 percent. Irregular and sharp fluctuations in luminosity could not be explained either by its own characteristics, nor a swarm of comets or other conventional reasons. Hypotheses related to the activities of an alien civilization, seem too incredible.

Meanwhile, after a study of archival observations in 2016, revealed that over the past 130 years “Star Tabby” slowly faded, losing about 14 percent of the luminosity, and in recent years – about 3 percent annually. No wonder she was one of the most intriguing mysteries of astronomy. A new look on her offer Brian Metzger (Brian Metzger) and his colleagues at Columbia University.

In an article published on the online Preprint service ArXiv.org scientists ready to explain all the strangeness of the “Stars Tabby” planet, which she pulled, torn apart and partially devoured. The fall of the star additional volumes of substances could cause a temporary boost in its brightness, flash, which then slowly faded out, as became apparent in the historical data. Depending on the size of the planet and the volume of the absorbed substance is a dramatic event could occur somewhere between 200 and 10 thousand years ago.

In this part of the fragments of the deceased celestial body (and possibly its satellite or satellites) can still stay orbiting around the star. A fairly dense cloud of debris and shades KIC 8462852 from time to time, passing between us and its disk. According to the calculations of authors, following the blackout period, you will get a better look at what is happening with the star and compare it with the predictions of the new hypothesis.

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