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PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE

Displaying all lectures given by: John Moffat


PIRSA:19050041  ( MP4 Medium Res , PDF ) Which Format?
Testing General Relativity with supermassive black holes: M87
Speaker(s): John Moffat
Abstract:
Date: 23/05/2019 - 11:30 am

PIRSA:19030099  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Assessment of the particle standard model: An alternative formulation.
Speaker(s): John Moffat
Abstract: An assessment of the particle standard model and an alternative formulation of the model are presented. An ultraviolet complete particle model is constructed for the observed particles of the standard model. The quantum field theory associates infinite derivative entire functions with propagators... read more
Date: 04/03/2019 - 1:00 pm

PIRSA:17030021  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Modified Gravity, Gravitational Waves and Black Holes
Speaker(s): John Moffat
Abstract: Modified gravitation known as Scalar-Tensor- Vector-Gravity (STVG) and MOG and its consequences for dark matter and dark energy in astrophysics and cosmology and black holes is reviewed. A variable speed of light (VSL) cosmology is compared to inflation. MOG predictions for gravitational waves are c... read more
Date: 16/03/2017 - 11:00 am

PIRSA:16010070  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Modified Gravity (MOG), Dark Matter, and Black Holes
Speaker(s): John Moffat
Abstract: According to the standard model of cosmology 96% of the matter and energy in the universe is invisible. The dark matter particles comprising the invisible material have so far not been detected in laboratory and astrophysical experiments.  The dark energy responsible for the acceleration of... read more
Date: 14/01/2016 - 11:00 am

PIRSA:15040053  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Modified Gravity, Dark Matter and Black Hole Shadows
Speaker(s): John Moffat
Abstract: A modified gravity (MOG) theory has been developed over the past decade that can potentially fit all the available data in cosmology and the present universe. The basic ingredients of the theory are described by an action principle determined by the Einstein-Hilbert metric tensor and curvature tenso... read more
Date: 02/04/2015 - 1:00 pm

PIRSA:14110133  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Modified Gravity (MOG) and Dark Matter: Can We Detect Dark Matter in the Present Universe?
Speaker(s): John Moffat
Abstract: A modified gravity (MOG) theory is explored that can explain current observational data in the present universe without detectable dark matter. This data includes galaxy rotation curves, cluster dynamics, gravitational lensing, globular clusters, the Bullet Cluster and solar system experiments. A ve... read more
Date: 20/11/2014 - 11:00 am

PIRSA:14060044  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Inflation, Variable Speed of Light and BICEP2
Speaker(s): John Moffat
Abstract: A variable speed of light (VSL) cosmology is developed with a spontaneous breaking of Lorentz invariance in the early universe. A non-minimal electromagnetic coupling to curvature and the resulting quantum electrodynamic vacuum polarization dispersive medium can produce c >> c0 in the early universe... read more
Date: 12/06/2014 - 11:00 am

PIRSA:12110074  ( MP4 Medium Res , MP4 Low Res , MP3 , PDF ) Which Format?
Modified Gravity, Dark Matter and Dark Energy: Deep Mysteries of the Universe
Speaker(s): John Moffat
Abstract:
Date: 14/11/2012 - 8:00 pm

PIRSA:10100090  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Ultraviolet Complete Quantum Gravity
Speaker(s): John Moffat
Abstract: An ultraviolet complete quantum gravity theory is formulated in which vertex functions in Feynman graphs are entire functions and the propagating graviton is described by a local, causal propagator. A scalar-tensor action describes classical gravity theory. The cosmological constant problem is inves... read more
Date: 28/10/2010 - 2:30 pm

PIRSA:09110128  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Void or Dark Energy?
Speaker(s): John Moffat
Abstract: Two possible explanations for the type SNe Ia supernovae observations are a nonlinear, underdense void embedded in a matter dominated Einstein-de Sitter spacetime or dark energy in the ?CDM model. Both of these alternatives are faced with Copernican fine-tuning problems. A case is made for the void ... read more
Date: 17/11/2009 - 2:00 pm

PIRSA:09050076  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Positive and Negative Energy Symmetry and the Cosmological Constant Problem
Speaker(s): John Moffat
Abstract: The Hamiltonian for the quantized gravitational and matter fields contains both positive and negative energy particle contributions, which leads through a positive and negative energy symmetry of the vacuum to a cancellation of the zero-point vacuum energy and a vanishing cosmological constant in th... read more
Date: 25/05/2009 - 2:45 pm

PIRSA:09020027  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Redesigning Electroweak Theory: Does the Higgs Particle Exist?
Speaker(s): John Moffat
Abstract: An electroweak model in which the masses of the W and Z bosons and the fermions are generated by quantum loop graphs through a symmetry breaking of the vacuum is investigated. The model is based on a regularized quantum field theory in which the quantum loop graphs are finite to all orders of pertur... read more
Date: 20/02/2009 - 1:00 pm

PIRSA:08020047  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Modified Gravity and Its Consequences for Astronomy, Astrophysics and Cosmology
Speaker(s): John Moffat
Abstract: The consequences of a modified gravity (MOG) are explored. I demonstrate how the solutions of the field equations obtained from the action principle of the MOG lead to a theory without any free, adjustable parameters or ad-hoc empirical formulae. The theory successfully explains solar system obse... read more
Date: 19/02/2008 - 2:00 pm

PIRSA:07050045  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Modified Gravity and its Consequences for the Solar System, Astrophysics and Cosmology
Speaker(s): John Moffat
Abstract: A relativistic modified gravity (MOG) leads to a self-consistent, stable gravity theory that can describe the solar system, galaxy and clusters of galaxies data and cosmology without dark matter. A review is given of fits to galaxy rotation curves, mass profiles of X-ray clusters and weak and strong... read more
Date: 20/05/2007 - 4:30 pm

PIRSA:05090012  ( MP4 Medium Res , MP3 , PDF ) Which Format?
The Pioneer Anomaly
Speaker(s): John Moffat
Abstract:
Date: 27/09/2005 - 2:00 pm

PIRSA:05080008  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Einstein - Relativity and Beyond
Abstract: Einstein’s profound ideas about relativity and the quantum have provided generations of people with some of the most thought-provoking concepts ever proposed about the wonders and mysteries of our universe. This lively panel discussion will examine Einstein’s enormous contributions to our understa... read more
Date: 12/08/2005 - 12:35 pm
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