2 supermassive black holes with orbital periods of only 2 years

study of both Exact size of gravitational waves detected on Earth by LIGO and Virgo Images of the M87* taken by members of the collaboration event horizon telescope gave us very solid arguments for the existence of black holes, though not conclusive yet, We have even less reason to suspect that behind an active core of galaxies hide from supermassive black hole from one million to several billion public Solar.

However, we know specifically because of the images taken with Telescope Hubble argues that collisions occur between large galaxies, and we have every reason to believe that all large galaxies contain supermassive black holes. count too digital depending on the type of comparison, for example confrontation Gravity which a. can put gas OfStars in one galaxy on another Star crossing it, show that during Merger 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 teamastronomy in a publication that can be read arXiv and that is done Feather blazer PKS 2131-021 approx 9 billion . situated atlight year Of Galaxy, remember that according to Integrated model of active galaxy nuclei (AGN) which recently got a new rationaleblazers are simple KaiserHence the rotation of the supermassive black hole Case And for this reason issue . monstrous waves ofenergywhose jets of matter are directed coincidentally in or near our direction.

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As mentioned in a press release jet propulsion laboratory Of NASAPKS 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. Body kip thorne And Richard Feynmanmonitor withradio observatory of the Owens Valley in Northern California. astronomers 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 Glow 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, Co-authored with Kip Thorne of An Essential physics book 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 Speedthe dance in which he performs To revolve around 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 (First OJ 287. Is), 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 orbital time 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.

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Two stars must have already been lost in significant amountsgravitational waves which, as in the case of stellar black hole Ligo and . found out with Virgo, 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 elisa detector, 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 galaxy’s central black hole 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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Prone to fits of apathy. Music specialist. Extreme food enthusiast. Amateur problem solver.

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