-
Antoine Petiteau (APC - Université Paris-Diderot), Martin Hewitson (AEI Hannover)08/12/2021 15:00
-
Jon Gair08/12/2021 15:30
-
Volonteri Marta08/12/2021 16:00
-
Witek Helvi08/12/2021 16:25
-
Daniela Doneva08/12/2021 17:05
-
Quentin Baghi (NASA GSFC - USRA)08/12/2021 17:30
-
Peera Simakachorn (Universität Hamburg and DESY)08/12/2021 18:00
This talk focuses on a matter-kination era that can occur naturally inside the standard radiation era due to axion dynamics. The matter-kination era imprints a smoking-gun GW peak on the irreducible inflationary GW background as well as on the local/global cosmic-string GW background, whose position depends on kination's energy scale and duration. Remarkably, the viable parameter space allows...
Go to contribution page -
Jacopo Fumagalli (IAP)08/12/2021 18:10
Observational constraints and prospects for detection of features, i.e. physically motivated oscillations in the primordial power spectrum, have so far concentrated on the CMB and Large Scale Structure surveys. These oscillations are induced by transient non-adiabatic dynamics along the inflationary history that generate a burst of particle production during inflation.
Go to contribution page
I will show how... -
Ido Ben-Dayan (BGU (Ben Gurion University))08/12/2021 18:20
We discuss the status of Bouncing Cosmology models and their predictions for LISA. Specific emphasis will be given for models with sourced fluctuations that may be observed by several probes.
Go to contribution page -
Alex Jenkins (King's College London)08/12/2021 18:30
The passage of gravitational waves (GWs) through a binary perturbs the trajectories of the two bodies, potentially causing observable changes to their orbital parameters. In the presence of a stochastic GW background (SGWB) these changes accumulate over time, causing the binary orbit to execute a random walk through parameter space. In this talk I will present a powerful new formalism for...
Go to contribution page -
Ville Vaskonen (IFAE)08/12/2021 18:40
The merger rate of (10𝑀⊙) black holes inferred from the LIGO-Virgo observations indicates that these binaries generate a sizeable gravitational wave foreground. In this talk I will present a simple analysis quantifying the impact of this foreground on the detectability of the primordial gravitational wave background by future gravitational wave experiments.
Go to contribution page -
Saeed Rastgoo08/12/2021 18:50
We consider the polymer quantization of gravitational waves propagating on a classical cosmological background. The model is flexible in the sense that the background can be chosen to be FLRW, flat. etc. Using this model, we study some of the observational signatures associated with quantum gravity imprinted on such gravitational waves. These include the modification to the dispersion...
Go to contribution page -
Simone Mastrogiovanni09/12/2021 15:00
-
Danny Laghi (L2I Toulouse, CNRS/IN2P3)09/12/2021 15:20
-
Niccolò Muttoni (L2IT Toulouse, CNRS/IN2P3)09/12/2021 15:30
-
Mandic Vuk09/12/2021 15:40
-
Neil Cornish09/12/2021 16:00
-
Angelo Ricciardone (INFN - Padova), Germano Nardini (University of Stavanger), Gianmassimo Tasinato (Swansea Uni), Juan Garcia-Bellido, Sebastien Clesse (Université Libre de Bruxelles (ULB), Brussels), Tessa Baker09/12/2021 16:20
-
Angelo Ricciardone (INFN - Padova), Germano Nardini (University of Stavanger), Gianmassimo Tasinato (Swansea Uni), Juan Garcia-Bellido, Sebastien Clesse (Université Libre de Bruxelles (ULB), Brussels), Tessa Baker09/12/2021 17:05
-
09/12/2021 17:20
-
Alberto Roper Pol (APC)09/12/2021 18:20
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...
Go to contribution page -
Ryusuke Jinno (Instituto de Física Teórica)09/12/2021 18:30
Over the next few decades, we will have an exciting opportunity to detect GWs from the early Universe with space interferometers. In this talk, we first propose a new numerical scheme to calculate GWs from sound waves in first-order phase transitions, which reveals more detailed structure of the spectrum. Based on this simulation, we next discuss the possibility of the enhancement of the GW...
Go to contribution page -
Marek Lewicki (University of Warsaw)09/12/2021 18:40
We will discuss energy budget of first order phase transitions and identify models capable of supporting extreme supercooling necessary to feature bubble collisions as the main source of gravitational waves. We will also review new semi-analytical calculation of the spectrum appropriate in such strong transitions.
Go to contribution page -
Marco Antonio Merchand Medina (University of Warsaw)09/12/2021 18:50
Computing the properties of the bubble wall of a cosmological first order phase transition at electroweak scale is of paramount importance for the correct prediction of the baryon asymmetry of the universe and the spectrum of gravitational waves. By means of the semi-classical formalism we calculate the velocity and thickness of the wall using as theoretical framework the scalar singlet...
Go to contribution page -
Alex Jenkins (King's College London)
The passage of gravitational waves (GWs) through a binary perturbs the trajectories of the two bodies, potentially causing observable changes to their orbital parameters. In the presence of a stochastic GW background (SGWB) these changes accumulate over time, causing the binary orbit to execute a random walk through parameter space. In this talk I will present a powerful new formalism for...
Go to contribution page -
Marco Antonio Merchand Medina (University of Warsaw)
Computing the properties of the bubble wall of a cosmological first order phase transition at electroweak scale is of paramount importance for the correct prediction of the baryon asymmetry of the universe and the spectrum of gravitational waves. By means of the semi-classical formalism we calculate the velocity and thickness of the wall using as theoretical framework the scalar singlet...
Go to contribution page -
Danny Laghi (L2I Toulouse, CNRS/IN2P3)
In this talk we discuss the potential of Extreme Mass-Ratio Inspirals (EMRIs) observed by LISA as dark standard sirens by cross-matching their sky localisation region with mock galaxy catalogs, i.e., statistically inferring the galaxy host redshift. We report constraints on the cosmological parameters assuming either a ΛCDM model or a redshift-evolving dark energy equation of state, showing...
Go to contribution page -
Marek Lewicki (University of Warsaw)
We will discuss energy budget of first order phase transitions and identify models capable of supporting extreme supercooling necessary to feature bubble collisions as the main source of gravitational waves. We will also review new semi-analytical calculation of the spectrum appropriate in such strong transitions.
Go to contribution page -
Ryusuke Jinno (Instituto de Física Teórica)
Over the next few decades, we will have an exciting opportunity to detect GWs from the early Universe with space interferometers. In this talk, we first propose a new numerical scheme to calculate GWs from sound waves in first-order phase transitions, which reveals more detailed structure of the spectrum. Based on this simulation, we next discuss the possibility of the enhancement of the GW...
Go to contribution page -
Dr Ville Vaskonen (IFAE)
The merger rate of $\mathcal{O}(10M_\odot)$ black holes inferred from the LIGO-Virgo observations indicates that these binaries generate a sizeable gravitational wave foreground. In this talk I will present a simple analysis quantifying the impact of this foreground on the detectability of the primordial gravitational wave background by future gravitational wave experiments.
Go to contribution page -
Niccolò Muttoni (L2IT Toulouse, CNRS/IN2P3)
Massive stellar origin black hole binaries, originating from stars above the pair-instability mass gap, are primary candidate for multi-band gravitational wave observations. In this talk we show the possibility to use them as effective dark standard sirens to constrain cosmological parameters, with a particular focus on the Hubble constant $\text{H}_0$. The long lasting inspiral signal emitted...
Go to contribution page -
Saeed Rastgoo
We consider the polymer quantization of gravitational waves propagating on a classical cosmological background. The model is flexible in the sense that the background can be chosen to be FLRW, flat. etc. Using this model, we study some of the observational signatures associated with quantum gravity imprinted on such gravitational waves. These include the modification to the dispersion...
Go to contribution page -
Jacopo Fumagalli (IAP)
Observational constraints and prospects for detection of features, i.e. physically motivated oscillations in the primordial power spectrum, have so far concentrated on the CMB and Large Scale Structure surveys. These oscillations are induced by transient non-adiabatic dynamics along the inflationary history that generate a burst of particle production during inflation.
Go to contribution page
I will show how... -
Peera Simakachorn (Universität Hamburg and DESY)
This talk focuses on a matter-kination era that can occur naturally inside the standard radiation era due to axion dynamics. The matter-kination era imprints a smoking-gun GW peak on the irreducible inflationary GW background as well as on the local/global cosmic-string GW background, whose position depends on kination's energy scale and duration. Remarkably, the viable parameter space allows...
Go to contribution page -
Ido Ben-Dayan (BGU (Ben Gurion University)), Udaykrishnna Thattarampilly (Ariel University)
We discuss the status of Bouncing Cosmology models and their predictions for LISA. Specific emphasis will be given for models with sourced fluctuations that may be observed by several probes.
Go to contribution page -
3. Turbulent production of polarized gravitational radiation from primordial helical magnetic fieldsAlberto Roper Pol (APC)
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...
Go to contribution page
Choisissez le fuseau horaire
Le fuseau horaire de votre profil: