Video URL
https://pirsa.org/17010057Not quite a black hole
APA
Ren, J. (2017). Not quite a black hole. Perimeter Institute for Theoretical Physics. https://pirsa.org/17010057
MLA
Ren, Jing. Not quite a black hole. Perimeter Institute for Theoretical Physics, Jan. 31, 2017, https://pirsa.org/17010057
BibTex
@misc{ scivideos_PIRSA:17010057, doi = {10.48660/17010057}, url = {https://pirsa.org/17010057}, author = {Ren, Jing}, keywords = {Cosmology}, language = {en}, title = {Not quite a black hole}, publisher = {Perimeter Institute for Theoretical Physics}, year = {2017}, month = {jan}, note = {PIRSA:17010057 see, \url{https://scivideos.org/index.php/pirsa/17010057}} }
Jing Ren University of Toronto
Abstract
Astrophysical black hole candidates, although long thought to have a horizon, could be horizonless ultra-compact objects. This intriguing possibility is motivated by the black hole information paradox and a plausible fundamental connection with quantum gravity. In this talk I will consider the asymptotically free quadratic gravity as the UV completion of general relativity. Using a classical theory that captures its main features, we find that sufficiently dense matter produces a novel horizonless solution, the 2-2-hole. It closely matches the exterior Schwarzschild solution down to about a Planck proper length of the would-be horizon. I will describe interesting features of the 2-2-hole and various physical implications. As a generic static solution, the 2-2-hole may be the nearly black endpoint of gravitational collapse.