A titanic gravitational wave generated by the merger of two blacks holes hosted by a single galaxy has projected the black hole so formed outside the galaxy itself. The event, which was predicted on the basis of theoretical models and computer simulations, was observed for the first time by researchers at the Max-Planck-Institute for Extraterrestrial Physics in Garching, near Monaco, Germany. The discovery - as the researchers explain in an article published in the Astrophysical Journal Letters of 10 May - will have a major impact on understanding the formation and evolution of the early universe. When blacks
two holes merge, the gravitational waves produced are emitted mainly in one direction, had the effect of pushing the newly formed black hole in the opposite direction. And if it impressed by the speed at this pressure is high enough, the black hole can be ejected from the galaxy. And this is exactly what has happened to the black hole known by the abbreviation SDSSJ092712.65 +294344.0.
The attention of researchers, who first observed the effects of an event of this type with the observations of the ROSAT satellite, was attracted by a high rate of displacement - more than 2650 kilometers per second - the cloud of gas that is the accretion disk of a supermassive black hole has a mass 100 million times higher than that of the Sun
The event confirms the predictions made sulla base della teoria generale della relatività, ma c'è anche un'altra implicazione della scoperta: da un lato, esistono galassie prive di un buco nero al loro centro e, dall'altro, negli spazi intergalattici devono vagare buchi neri solitari. Questa circostanza - come osserva Stefanie Komossa, che ha diretto la ricerca - pone altre questioni: Galassie e buchi neri si sono evoluti assieme nel primo universo? Qual è la consistenza della popolazione di galassie di questo tipo? Le galassie private del loro buco nero subiscono un'evoluzione differente dalle altre? Domande a cui ora i ricercatori cercheranno di rispondere.
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