Italian astronomers discovered the unusual activity of the supernatrical X-ray source of NGC 4559 x7, which is located at a distance of 29 million light years from the ground. This is reported in the preprint of articles published in the ARXIV repository.
NGC 4559 is a medium-sized spiral galaxy located in the constellation of Veronica’s hair. It is known that there are two bright X-ray sources: x7 and x10. Until now, these objects have been poorly investigated, so in the new work, scientists analyzed all available x7 data obtained using XMM-Newton, Nustar, Chandra and Swift spacecraft.
Astronomers built a gloss ngc 4559 x7 curve. It turned out that the light flux from the source intensified about 5-6 times in a few hours. In addition, at the time of the maximum luminosity of the object, scientists observed a flare activity, which was not previously observed for this X7. At the time of the explosions of the unknown nature, the source allocated energy of about 60 erg duodeticillion per second. In this case, the flashes are repeated with irregular frequency.
According to scientists, the mysterious outbreaks of the supernoral X-ray source (ULX) cannot be explained only by one mechanism. Experts are argued by the fact that the flare activity is not characteristic of ULX and was observed only in a small number of sources that had no quasiperiodicity in the brightness change. However, such a picture may occur in the case of absorption of a substance with a black hole or neutron star.