The search for “hierarchical” black holes has just begun.

The search for "hierarchical" black holes has just begun.

Researchers hope to find some examples of what they call black holes “hierarchical”. Thanks to recent theoretical discoveries, some modeling and especially new data on gravitational waves.

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[EN VIDÉO] Two neutron stars merge to form a black hole
In this animation (not a note), NASA shows what is believed to be the collision of two neutron stars that formed a pair, one orbiting the other. Due to the collapse of a large star, these stars are very dense. When the two bodies get too close, tidal forces begin to tear them apart. The red areas show areas of less intensity. The merger gives the object such a density that it turns into a black hole. This scenario was validated in October 2017 by analysis of gravitational waves seen by Ligo and Virgo in August 2017 from the source named GW170817. © NASA

” From Tie and Virgin . Collaboration More than 50 events have already been updated fromgravitational waves. Thousands more will be added in the coming years. Lots of opportunities to discover or confirm the existence of amazing things.”, explains Maya Fischbach, a researcher at Northwestern University (USA) in A Press release from the University of Birmingham (United kingdom). So the chase is really open!

what are you looking for? what are you looking for Astrophysics Target black holes “hierarchical”. They are funny examples. The results of the different stages of integration. Black holes have recently attracted the attention of researchers. Because some signals were detected by: end to end Virgo defied their expectations. They have already shown it black holes The result of two objects merging Mass Completely different.

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Successive mergers of black holes

to explain this phenomenonIn fact, astrophysicists speculated that one of the black holes participating in the merger event must in fact be the same as the result of a previous black hole merger. We believe that most of the gravitational waves detected so far are the result of the collision of the first generation of black holesDavid Geroza Seigt, astronomer at the University of Birmingham. But we believe there is a good chance that there will still be remnants of previous mergers. These events have signatures fromgravitational waves Characteristic indicating higher masses and unusual rotation due to parental collision. “

Understanding the characteristics of the environment in which such things can be produced will also help in improving research. Undoubtedly an environment with a large number of black holes and dense enough to contain them after merging so that they can merge again. There is currently a file availableGW190521 EVENT, which was discovered in 2019, appears to be the most promising candidate.

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