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Aditya Vijaykumar (CITA)23/06/2026, 10:15Theoretical Physics / Physique théorique (DTP-DPT)Invited Speaker / Conférencier(ère) invité(e)
In the ten years since the first gravitational-wave (GW) detection, the LIGO, Virgo, and KAGRA detectors have amassed around 200 compact binary mergers and have revolutionized our understanding of physics. In this talk, I will describe the demographics of these objects—their mass, spin, redshift, etc., distributions—and their use as astrophysical probes. I will emphasize a hallmark feature of...
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Encieh Erfani (Perimeter Institute for Theoretical Physics)23/06/2026, 10:45Theoretical Physics / Physique théorique (DTP-DPT)Oral (Non-Student) / Orale (non-étudiant(e))
In this talk, I will review two gravitational wave (GW) signatures of primordial black holes (PBHs) as candidates for dark matter. I investigate the stochastic gravitational wave background (SGWB) generated by PBHs in the dense cores of dwarf galaxies (DGs), considering both hierarchical binary black hole (BBH) mergers and close hyperbolic encounters (CHEs). We incorporate up to four...
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Emily Spence (Carleton University)23/06/2026, 11:00Theoretical Physics / Physique théorique (DTP-DPT)Oral not-in-competition (Graduate Student) / Orale non-compétitive (Étudiant(e) du 2e ou 3e cycle)
Predicted by general relativity, gravitational waves (GW) provide direct, observable signatures of strongly gravitating systems operating in extreme and often counterintuitive regimes of spacetime, including binary systems and black holes. Binary systems provide a unique means to probe how general relativity encodes spacetime curvature into observable GW signals. While the intrinsic emission...
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Serge Hamoudou (PhD Student)23/06/2026, 11:15Theoretical Physics / Physique théorique (DTP-DPT)Oral Competition (Graduate Student) / Compétition orale (Étudiant(e) du 2e ou 3e cycle)
It is well known that in the bulk of a background electromagnetic field, photons and gravitons convert into one another. This phenomenon is known as the Gertsenshtein effect. In my research, use this result to examine what happens at a boundary separating a vacuum region from a background electromagnetic field, and I find that up to 34 % of an incoming gravitational wave’s energy can get...
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Thomas Forget (Université de Montréal)23/06/2026, 11:30Theoretical Physics / Physique théorique (DTP-DPT)Oral Competition (Graduate Student) / Compétition orale (Étudiant(e) du 2e ou 3e cycle)
We focus on the motion of a detector caused by a near-zone, time dependent gravitational source, taking into account general relativistic effects. We find that the corrections due to the acceleration of the source can be large enough so that they could potentially be measured. We then look at tectonic plate motion during earthquakes as a viable source that could allow for the prompt...
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Ekin Oran23/06/2026, 11:45Theoretical Physics / Physique théorique (DTP-DPT)Oral Competition (Undergraduate Student) / Compétition orale (Étudiant(e) du 1er cycle)
Active Galactic Nuclei (AGNs) are compact regions powered by the accretion of matter onto the supermassive black holes (SMBHs) at the centers of galaxies. In general relativity, the black hole singularities are hidden behind event horizons, beyond which light cannot escape. However, motivated by the information paradox, a variety of other solutions have been posited that do not have an event...
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