But many physicists hope that black holes are not bald, and instead have other properties that arise from parameters other than those three. Some physical properties of the solutions are discussed; in particular, and in contrast with Kerr BHs with scalar hair, some spacetime regions can be counter-rotating with respect to the horizon. In this review, I discuss tests of the no-hair theorem with current and future observations of such black holes across the electromagnetic spectrum, focusing on near-infrared observations of the supermassive black hole at the Galactic center, pulsar-timing and very-long baseline interferometric observations, as well as x-ray observations of fluorescent iron lines, thermal continuum spectra, variability, and polarization. Since the symmetry noninheritance is present in the scalar fields of boson stars and may enable the existence of the black hole scalar hair, our results narrow the possible classes of such solutions. It has been proposed that "hairy" black holes may be considered to be bound states of hairless black holes and solitons.

Enough by Emily Hunter is presented by Moonstone Theatre, reviving after pickingup the Best Drama award at the Greater Manchester Fringe Awards in 2023. Written, directed, produced, and performed by Danielle Scott, Sex, Drugs and Hairy Bum Holes is a one-woman dark comedy. This showed that, apart from mass, electrical charge and angular momentum, black holes can carry a finite scalar charge which might be a result of interaction with cosmological scalar fields such as the inflaton. The interplay between black holes and fundamental fields has attracted much attention over the years from both physicists and mathematicians.The concept of a causal or event horizon is central to the notion of a black hole,” Professor Hsu said. Superradiant instabilities of spinning black holes (BHs) can be used to impose strong constraints on ultralight bosons, thus turning BHs into effective particle detectors.

This hair permeates at a very low-energy state, which is why it didn't come up in previous calculations that postulated the no-hair theorem. 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.Put another way, quantum information that falls into a black hole does not escape in the form of radiation; rather, it vanishes completely from our Universe, thereby violating unitarity in quantum mechanics. In our minds, I’m sure we’re all thinking of the entrance series – how the hell will we get him through that lot? We argued that when the effective mass of the scalar field is negative, hairy black holes form in a symmetry-broken vacuum. The notion of quantum hair allows information about what goes into a black hole to come out again without violating any of the important principles of either theory. Prof Calmet's "yes hair theorem", published in the journal Physical Review Letters is revolutionary.

Whilst there are definitely some funny moments in the play, a lot of the humour doesn’t quite land with the audience. The scalar field coupling function includes a mass and a quartic interaction term, and that the gravity action has U(1) symmetry. Magnetic charge, if detected as predicted by some theories, would form the fourth parameter possessed by a classical black hole. Vote up content that is on-topic, within the rules/guidelines, and will likely stay relevant long-term.My aunt used to live in Chester-Le-Street so I was up there all the time when I was younger, but sadly they moved away before I was old enough to do any real exploring. Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. In this case, we learn that the Hawking radiation from a black hole is entangled with the quantum state of spacetime itself! Suppose two black holes have the same masses, electrical charges, and angular momenta, but the first black hole was made by collapsing ordinary matter whereas the second was made out of antimatter; nevertheless, then the conjecture states they will be completely indistinguishable to an observer outside the event horizon. Whether this is entirely apocryphal or there is a further, large, bone riddled cave to be found in Hesleden dene remains something to find out another day.