# Calendar

Critical phenomena, i.e. the appearance of universal scaling laws and self-similarity in the vicinity of phase transitions, appear in different fields of physics and beyond. Critical phenomena in gravitational collapse to black holes were first observed by Matt Choptuik about 25 years ago - a seminal discovery that launched a whole new field of research. Until recently, however, much of this research was restricted to spherical symmetry, and therefore could not account for effects that break this symmetry, in particular rotation. In this talk I will review the appearance of scaling laws and self-similarity close to the onset of black hole formation. I will then present new numerical relativity simulations of the gravitational collapse of rotating perfect fluids, in the absence of spherical symmetry. These simulations inform perturbative treatments of the problem, leading to the formulation of generalized scaling laws that take into account the role of angular momentum in the critical collapse to black holes.

\n\nSPEAKER:Thomas Baumgarte, Bowdoin College

464 Loomis

false## Astrophysics, Gravitation and Cosmology Seminar: "Critical Phenomena in Gravitational Collapse to rotating black holes"

Speaker |
(sign-up)
Thomas Baumgarte, Bowdoin College |
---|---|

Date: | 1/17/2018 |

Time: | 12 p.m. |

Location: | 464 Loomis |

Event Contact: | Milton Ruiz ruizm@illinois.edu |

Sponsor: | Department of Physics |

Event Type: | Seminar/Symposium |

Critical phenomena, i.e. the appearance of universal scaling laws and self-similarity in the vicinity of phase transitions, appear in different fields of physics and beyond. Critical phenomena in gravitational collapse to black holes were first observed by Matt Choptuik about 25 years ago - a seminal discovery that launched a whole new field of research. Until recently, however, much of this research was restricted to spherical symmetry, and therefore could not account for effects that break this symmetry, in particular rotation. In this talk I will review the appearance of scaling laws and self-similarity close to the onset of black hole formation. I will then present new numerical relativity simulations of the gravitational collapse of rotating perfect fluids, in the absence of spherical symmetry. These simulations inform perturbative treatments of the problem, leading to the formulation of generalized scaling laws that take into account the role of angular momentum in the critical collapse to black holes. |

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