GdR Gravitational Waves, Cosmology

Liste des Contributions

1. Ilia Musco (Geneva University): Primordial Black Holes: formation and cosmological impact

28/01/2021 09:50

2. Michele Mancarella (Geneva University): Constraining modified GW propagation with LIGO/Virgo dark sirens

28/01/2021 10:20

Modified GW propagation is a generic prediction of modified gravity models at cosmological scales and allows new tests of GR, based on the fact that GW signals are standard sirens.

The recent detections and data releases from LIGO/Virgo allow the first concrete applications of such tests.

I will present the hierarchical bayesian framework for constraining modified GW propagation (as well...

3. Siyuan Chen (Orléans University): 25 years of European Pulsar Timing Array

28/01/2021 11:10

Pulsar Timing Array (PTA) experiments aim to detect nHz gravitational waves from supermassive black hole binaries. This is done by looking for correlated variations of the times of Arrival across an array of ultra-stable millisecond pulsars. Regular observations have been taken and collected over the last 2 and more decades. Three established PTA collaborations: the North American Nanohertz...

4. Ryusuke Jinno (DESY): Gravitational waves from first-order phase transitions

28/01/2021 11:40

5. Alberto Roper Pol (APC Paris): Gravitational radiation from MHD turbulence in the early universe

28/01/2021 12:10

The generation of primordial magnetic fields and its interaction with the primordial plasma during cosmological phase transitions is turbulent in nature. I will describe and discuss results of direct numerical simulations of magnetohydrodynamic (MHD) turbulence in the early universe and the resulting stochastic gravitational wave background (SGWB). In addition to the SGWB, the primordial...

6. Angelo Ricciardone (INFN Padua): Probing anisotropies of the stochastic gravitational waves backgrounds with LISA

28/01/2021 14:20

Gravitational Waves (GWs) represent a unique tool to explore astrophysics, cosmology and fundamental physics of our universe. After the GW detections by the LIGO/Virgo collaboration the next target of future ground and space-based interferometers is the detection of the stochastic background of GW (SGWB), both astrophysical and hopefully cosmological. Beside their isotropic contribution, such...

7. Otto Hannuksela (Nikhef Amsterdam): Gravitational-wave lensing with ground-based gravitational-wave detectors

28/01/2021 14:50

Gravitational waves, like light, could be gravitationally lensed. Recent studies suggest that we might see gravitational wave lensing already within the coming years as the current ground based gravitational-wave detectors reach their design sensitivities. However, the methods to detect and utilize gravitational-wave lensing are entirely different from that of light. I will discuss some of the...

9. Sebastien Renaux-Petel (IAP): Probing primordial features with the Stochastic Gravitational Wave Background

28/01/2021 15:40

Features of the primordial density fluctuations power spectrum are theoretically extremely motivated and detecting them would provide a unique insight into the physics of the early universe. In this talk, I will show how the stochastic gravitational wave background (SGWB) offers a new way to probe primordial features, on scales complementary to the ones probed by the CMB and LSS. These...

8. Felix Mirabel (CEA): Is there a cosmic gravitational background from cosmic dawn?