Study finds flaw in emergent gravity

In recent years, some physicists have been investigating the possibility that gravity is not actually a fundamental force, but rather an emergent phenomenon that arises from the collective motion of small bits of information ...

How a particle may stand still in rotating spacetime

When a massive astrophysical object, such as a boson star or black hole, rotates, it can cause the surrounding spacetime to rotate along with it due to the effect of frame dragging. In a new paper, physicists have shown that ...

Shocks in the early universe could be detectable today

(Phys.org)—Physicists have discovered a surprising consequence of a widely supported model of the early universe: according to the model, tiny cosmological perturbations produced shocks in the radiation fluid just a fraction ...

Blazar PG 1553+113 investigated by researchers

Using space observatories and ground-based facilities, Chinese astronomers have investigated a blazar known as PG 1553+113. Results of this study shed more light on the behavior of this object, indicating that it hosts a ...

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