![]() The research team have produced a visualization of the system, showing how a huge X-ray output emanates from very close to the black hole, and then irradiates the surrounding matter, especially the accretion disc, heating it up to a temperature of around 10,000K, which is seen as the visual light emitted. This process is chaotic and highly variable, varying on timescales from milliseconds to months." Massive outbursts occur when the material in the disc becomes hot and unstable, accretes onto the black hole and releases copious amounts of energy before traversing the event horizon. ![]() Professor Phil Charles, researcher at the University of Southampton and member of the research team explained, "material from the normal star is pulled by the compact object into its surrounding accretion disc of spiraling gas. Because it remained bright for many months, this made it possible to be followed by so many amateurs. MAXI J1820+070 is one of the three brightest X-ray transients ever observed, a consequence of both its proximity to Earth and being outside of the obscuring plane of our Milky Way Galaxy. The discovery presented in the paper was made from an extensive and detailed light-curve obtained over almost a year by dedicated amateurs around the globe who are part of the AAVSO (American Association of Variable Star Observers). Jessymol Thomas, a Postdoctoral Research Fellow at the South African Astronomical Observatory (SAAO). The first findings have now been accepted for publication in the journal Monthly Notices of the Royal Astronomical Society. In this case, MAXI J1820+070 contains a black hole that is at least 8 times the mass of our Sun. These transients, systems that exhibit violent outbursts, are binary stars, consisting of a low-mass star, similar to our Sun and a much more compact object, which can be a white dwarf, neutron star or black hole. This object, MAXI J1820+070, erupted as a new X-ray transient in March 2018 and was discovered by a Japanese X-ray telescope onboard the International Space Station.
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