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Hairy Holes

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The signature feature of black holes is that they are black — objects which fall into the hole can no longer be seen and can no longer influence the outside Universe. At the classical level, the two stars have the same gravitational potential, but at the quantum level, the potential depends on the star composition. It turns out that black holes are in fact good children, holding onto the memory of the stars that gave birth to them,” Professor Calmet added.

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Here we discuss the no-hair property of BHs, how it can be measured in the electromagnetic or gravitational window, and what it can possibly tell us about our Universe.

The latter include hairy black holes in general relativity coupled with various matter fields, in scalar-tensor theories, namely Horndeski gravity or in theories with higher curvature terms.

In a paper published in the journal Physical Review Letters, Michigan State University’s Professor Stephen Hsu and colleagues demonstrate that black holes are more complex than originally understood and have a gravitational field that, at the quantum level, encodes information about how they were formed. Thus any black hole that has been isolated for a significant period of time can be described by the Kerr–Newman metric in an appropriately chosen reference frame. On the other hand, for shift symmetric theories of Horndeski and beyond Horndeski, black holes involve two classes of solutions: those that include, at the level of the action, a linear coupling to the Gauss–Bonnet term and those that involve time dependence in the galileon field.

According to the general-relativistic no-hair theorem, astrophysical black holes depend only on their masses and spins and are uniquely described by the Kerr metric. As a specific example of quantum effects, they show that exchanges of virtual gravitons result in an extremely weak gravitational force, which is absent in classical physics. Packaging: All packaging is plastic free, the cards and envelopes are secured with an easy peel card catch. Scott is a bold and confident actor, who isn’t afraid of being vulnerable on stage, acting out orgasms and sex scenes on her own.Although gravitational waves have yet to be directly detected, most physicists are confident they exist and should be found soon. The team’s results may resolve Stephen Hawking’s black hole information paradox, which has challenged physicists since 1976.

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