study of bothImages of the M87* taken by members of the collaboration gave us very solid arguments for the existence of black holes, though , We have even less reason to suspect that behind an active core of hide from from one million to several billion Solar.
However, we know specifically because of the images taken withHubble argues that collisions occur between large galaxies, and we have every reason to believe that all large galaxies contain supermassive black holes. count too depending on the type of comparison, for example Gravity which a. can put Of in one galaxy on another crossing it, show that during Of the two large galaxies, their respective supermassive black holes may end up sedimenting, so to speak, at the core of the resulting galaxy, so that one can observe galaxies with two supermassive black holes in their cores.
Jean-Pierre Luminet, director of research at CNRS and François Combs, professor at the Collge de France, tell us about black holes. © Hugot Foundation of the Collge de France
a metronome blazer
It’s been like this for some time, as proven by a teamin a publication that can be read and that Feather PKS 2131-021 approx 9 billion . situated at Of , remember that according to blazers are simple Hence the rotation of the supermassive black hole And for this reason issue . monstrous waves of whose jets of matter are directed coincidentally in or near our direction.
As mentioned in a press release jet propulsion laboratory OfPKS 2131-021 is one of 1,800 blazers by a group of researchers from the renowned Caltech in Pasadena, known particularly for their Nobel Prizes. And monitor with of the Owens Valley in Northern California. Blaser had been studying it for 13 years as part of a general exploration of the behavior. But this particular blazer displayed a strange behavior: its Predictably showing regular fluctuations as the clock is ticking.
A presentation of the discovery made with Blazor PKS 2131-021. It is a black hole surrounded by an accretion disk in which the jets of matter oscillate as the blazer forms a couple with another black hole. © Caltech
A black hole merger in 10,000 years
This is Roger Blandford,And above all an expert in black hole physics, who proposed one of the best models to explain quasar jets about 45 years ago with his colleague Roman Znajek, who managed to understand that in the case of PKS 2131-021 What was happening, that is, it was part of a binary black hole. Almost entirely sinusoidal oscillations in the blazer’s brightness were due to the dance in which he performs with his partner.
Not only were we in front of another solidly established example of the existence of a binary supermassive black hole at the center of the Milky Way (), but it breaks a record because studies conducted at the end of 45 years of observation of PKS 2131-021 in various ways showed that we were in the presence of the smallest For such a star, only two years. Then the diameter of the orbit would be 10 to 100 times smaller than that of OJ 287.
Two stars must have already been lost in significant amountswhich, as in the case of Ligo and . found out with , will prompt them to merge. But that won’t happen until about 10,000 years from now. Therefore humanity will not be able to participate in this program , It is believed that about 100 million years should elapse between the beginning of the merger of the two galaxies and the final merger of their supermassive black holes. In the case of PKS 2131-021, each of the compact bodies involved is estimated to have hundreds of millions of solar masses. let’s remember that Only a little over 4 million.
Professor François Combs of the Collge de France tells us about supermassive black holes. © Ecole Normale Superior, PSL
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