# Planck stars

@inproceedings{Rovelli2014PlanckS, title={Planck stars}, author={C. Rovelli and F. Vidotto}, year={2014} }

A star that collapses gravitationally can reach a further stage of its life, where quantum-gravitational pressure counteracts weight. The duration of this stage is very short in the star proper time, yielding a bounce, but extremely long seen from the outside, because of the huge gravitational time dilation. Since the onset of quantum-gravitational effects is governed by energy density —not by size— the star can be much larger than planckian in this phase. The object emerging at the end of the… Expand

#### Paper Mentions

#### 166 Citations

On dark stars, Planck cores and the nature of dark matter

- Physics
- 2021

Dark stars are compact massive objects, described by Einstein gravitational field equations with matter. The type we consider possesses no event horizon, instead, there is a deep gravitational well… Expand

On dark stars, galactic rotation curves and fast radio bursts

- Physics
- 2021

This paper is a continuation of our recent work on Radial Dark Matter stars (RDM-stars), black holes, coupled with radial flows of dark matter. As a galaxy model, it produces flat rotation curves,… Expand

RDM-stars as sources of fast radio bursts

- Physics
- 2018

In this work we consider a recently formulated model of a black hole coupled with radially directed flows of dark matter (RDM-star). In this model, a cutoff by quantum gravity (QG) creates a core of… Expand

Asymptotic safety casts its shadow

- Physics
- 2019

We set out to bridge the gap between regular black-hole spacetimes and observations of a black-hole shadow by the Event Horizon Telescope. We explore modifications of spinning and non-spinning… Expand

Classical Collapse to Black Holes and Quantum Bounces: A Review

- Physics
- 2017

In the last four decades, different programs have been carried out aiming at understanding the final fate of gravitational collapse of massive bodies once some prescriptions for the behaviour of… Expand

The observational evidence for horizons: from echoes to precision gravitational-wave physics

- Physics
- 2017

The existence of black holes and of spacetime singularities is a fundamental issue in science. Despite this, observations supporting their existence are scarce, and their interpretation unclear. We… Expand

Where Does the Physics of Extreme Gravitational Collapse Reside

- Physics
- 2015

The gravitational collapse of massive stars serves to manifest the most severe deviations of general relativity with respect to Newtonian gravity: the formation of horizons and spacetime… Expand

Planck-Star Tunnelling-Time: an Astrophysically Relevant Observable from Background-Free Quantum Gravity

- 2016

A gravitationally collapsed object can bounce-out from its horizon via a tunnelling process that violates the classical equations in a finite region. Since tunnelling is a non-perturbative… Expand

Planck star phenomenology

- Physics
- 2014

It is possible that black holes hide a core of Planckian density, sustained by quantum-gravitational pressure. As a black hole evaporates, the core remembers the initial mass and the final explosion… Expand

Effects of primordial black holes quantum gravity decay on galaxy clustering

- Physics
- 2017

It has been recently suggested that small mass black holes (BHs) may become unstable due to quantum-gravitational effects and eventually decay, producing radiation, on a timescale shorter than the… Expand

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