On 25 June the European space Agency (ESA) announced that a week closely monitors the dual system V404 Cygni, which includes black hole and star in two times less than the Sun.
In the black hole of this system once again break out the flash x-ray and gamma radiation. This happens about every 25 years — the last time the flash was recorded by the Japanese satellite Ginga in 1989, after which black hole "fell asleep".
It is assumed that a black hole, being more orange dwarf 24 times, gradually attracts its substance. Approaching a black hole, gas from the star begins to revolve around it, taking the form of a disk. Gradually, it heats up and flashes, disappearing in a black hole. At the moment, even the glow of the crab nebula, one of the most powerful in x-rays, second in brightness flashes awakened the black hole about 50 times. The intervals between them on average less than one hour, the brightness varies. Employee EKA Eric Kuulkers admitted that only once in your career, the astronomer gets a chance to observe the phenomenon of this magnitude.
Awakened black hole is in the milky Way at a distance of about 8000 light years from Earth, allowing scientists to observe in several bands. Most black holes much farther. The study of what is happening in V404 Cygni may help us to understand how a black hole consumes matter.published
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