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Geoffrey Compère (ULB), Sébastien Clesse (Université Libre de Bruxelles (ULB))27/10/2020, 09:00
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Giacomo Bruno (UCLouvain), Joris van Heijningen (UCLouvain)27/10/2020, 09:10
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Nick Van remortel (U Antwerp)27/10/2020, 09:20
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Jean-René Cudell27/10/2020, 09:30
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Binlei Ding (ULB)27/10/2020, 09:40
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Nicolas Chamel (ULB)27/10/2020, 09:50
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Thomas Hertog (KULeuven)27/10/2020, 10:00
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Alexander Sevrin27/10/2020, 10:10
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Archisman Gosch (UGent)27/10/2020, 10:20
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Geoffrey Compère, Sébastien Clesse (Université Libre de Bruxelles (ULB))27/10/2020, 10:30
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Maxime Fays (ULiège)27/10/2020, 11:00
Astrophysical phenomena originating around the death of massive stars are predicted to generate minute-long gravitational-wave transients for which robust predictive models are not readily available.
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As searches looking for such signals must rely on minimal assumptions, they are also sensitive to gravitational waves emitted from unpredicted sources and have strong potential for discovering as... -
Kamiel Jansens (UAntwerp)27/10/2020, 11:20
The stochastic searches of the LIGO/Virgo collaborations will be discussed. We start with a general introduction to the searches, the sources we might observe in the future and the different search-types that are performed. Afterwards we have a look at the current state of the art and the outlook when the latest results might be expected. In the second part of the presentation we will focus on...
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Andrew Miller (UCLouvain)27/10/2020, 11:40
We adapt a method, originally developed for continuous gravitational-wave searches, to directly detect dark photon dark matter. The method involves optimally choosing the analysis coherence time as a function of the frequency band analyzed, such that all of the signal's power will be confined to one frequency bin during the observation time. We describe the dark photon signal in detail, and...
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André Füzfa (UNamur), Nicolas Herman (UNamur)27/10/2020, 12:00
Electromagnetic detectors (and generators) of gravitational waves have been considered since the early 70s, besides of the mechanical detectors and laser interferometers. The so-called Gertsenshtein effect describes the generation of gravitational waves when light passes through some constant magnetic field. However, it is the reverse phenomena – electromagnetic waves arising when incoming...
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Alberto Gatti (KULeuven), Ciana Barretto (KULeuven)27/10/2020, 12:20
Advanced gravitational wave detectors operate under extreme conditions of temperature and/or radiation. We will discuss both the advantages and challenges of employing custom chips for these systems. Specific challenges are highlighted for the Einstein Telescope and LISA design cases with the current techniques and work done to ensure reliable performance in each of the environments.
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27/10/2020, 13:40
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Ali Seraj (ULB)27/10/2020, 14:00
In this talk, I will present the generalized BMS symmetries and their associated charges. Then I will explain the corresponding balance equations which quantify the non-conservation of these charges as a result of the gravitational waves. I will also briefly mention their relationship with the gravitational memory effect.
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Martin Bonte (ULB)27/10/2020, 14:20
I would like to present a computation I have done. It is the partition of the quantum partition function at non-zero temperature of a spin-2 field (gravitational field at linearized level) in a setup close to the usual electromagnetic Casimir computation with perfectly conducting plates. The 3D geometry is a flat manifold with boundaries at z=0 and z=L (and infinitely extended in the two other...
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Iason Blades (ULB)27/10/2020, 14:40
As a way of an introduction, I will briefly discuss some recent work on models of the early universe in which the abundance of dark matter is set by a period of late-time thermal inflation. Such scenarios terminate in very strong phase transitions which can be detected by upcoming gravitational wave interferometers.
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Cristian Joana (UCLouvain)27/10/2020, 15:00
We use of the 3+1 formalism of numerical relativity to investigate the robustness of Starobinsky and Higgs inflation to inhomogeneous initial conditions dominated by either scalar field gradients or by the kinetic energy density. Strong Sub-Hubble fluctuations generically lead to inflation after a dynamical phase driven by an oscillatory equation of state. On the other hand, Super-Hubble...
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Alberto Mariotti (VUB)27/10/2020, 15:20
We begin the exploration of calculable SUSY-breaking hidden sectors delivering Gravitational Wave (GW) signals from first order phase transitions (FOPT). We discuss an extensive class of models where the FOPT is tied to the breaking of R-symmetry along the pseudo-flat direction universally related to SUSY-breaking. Once a mediaton scheme is specified, the frequency of the GW peaks correlates...
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Xunjie Xu (ULB)27/10/2020, 16:10
Right-handed neutrinos (νR) are often considered as a portal to new hidden physics. It is tempting to consider a gauge singlet scalar (ϕ) that exclusively couples to νR via a νRνRϕ term. Such a νR-philic scalar does not interact with charged fermions at tree level but loop-induced effective interactions are inevitable, which are systematically investigated in this work. The magnitude of the...
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Prasanta Char (ULiège)27/10/2020, 16:30
We study the odds for the secondary component of GW190814 being a neutron star incorporating a large spin while also employing a stiff high density equation of state of nuclear matter. Since its mass resides $\in (2.50,2.67) M_\odot$, it could be the heaviest neutron star or the lightest black hole ever observed. Therefore, finding its true nature has far reaching implications on the...
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Matteo Lucca (ULB)27/10/2020, 16:50
Although the main features of the evolution of binary neutron star (NS) systems are now well established, many details are still subject to debate, especially regarding the merger and post-merger phase. For instance, the precise mechanism responsible for the production of the secondary peaks in the observable gravitational wave (GW) power spectral density is still unclear. Thus, in order to...
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Loïc Perot (ULB)27/10/2020, 17:10
Formed in gravitational core-collapse supernovae explosions, neutron stars are the most compact stars known in the universe: their average density exceeds than that found in atomic nuclei. The properties of the dense matter contained in their core are still poorly known. In this talk, I will present my first results about the role of the dense matter properties on the tidal deformability and...
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27/10/2020, 17:30
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