-
Dr Jonathan Gair (Max Planck Institute for Gravitational Physics (Potsdam))17/06/2024, 14:40
-
Carlos F. Sopuerta (Institute of Space Sciences (ICE, CSIC & IEEC))17/06/2024, 15:20
-
Germano Nardini (University of Stavanger)17/06/2024, 16:30
-
Dr Eric Madge Pimentel (Weizmann Institute of Science)17/06/2024, 17:00
-
Dr Ivan Rybak (CAPA, Universidad de Zaragoza)17/06/2024, 17:30
-
Dr Matteo Braglia (New York University)17/06/2024, 18:00
-
Alberto Roper Pol (Universite de Geneve (CH))18/06/2024, 14:30
I will review the production of GWs by the anisotropic stresses of velocity and magnetic fields induced in a first-order phase transition. I will present analytical estimates and numerical simulations that address the production of gravitational waves by sound waves and by MHD turbulence, and show how such an observation by LISA could allow us to understand the nature of the electroweak phase...
Go to contribution page -
Marco Finetti (Aveiro University)18/06/2024, 14:45
The baryon asymmetry problem remains a crucial challenge in particle physics and cosmology. Electroweak baryogenesis, a leading mechanisms to produce the matter-antimatter asymmetry we observe today, requires an extension to the Standard Model to achieve a sufficiently strong first order phase transition.
Go to contribution page
Besides representing a target for several future-generation colliders, such Beyond the... -
Lorenzo Giombi (University of Helsinki)18/06/2024, 15:00
Future space-based interferometers, such as LISA, offer an unprecedented opportunity to detect signals from the stochastic gravitational wave background originating from a first-order phase transition at the electro-weak scale, when elementary particles become massive. The generation of masses can induce a softening of the equation of state of the cosmic fluid and thereby accelerate the...
Go to contribution page -
Dr Robert Rosati (NASA - MSFC)18/06/2024, 16:30
-
Dr Cristian Joana (Institute of Theoretical Physics, Chinese Academy of Science)18/06/2024, 17:00
-
Alberto Mangiagli, Dr Macarena Lagos (Universidad Andres Bello)18/06/2024, 17:30
-
Danny LAGHI18/06/2024, 18:00
-
Nikolaos Karnesis (AUTh)19/06/2024, 14:30
-
Riccardo Buscicchio19/06/2024, 15:00
-
Jun'ya Kume (University of Padova, INFN, RESCEU)19/06/2024, 15:30
SGWBinner is a primary tool to investigate the reconstruction of cosmological gravitational wave signals with LISA. Its algorithms are highly developed and most parts of the analysis can be done easily on a laptop, but the final MCMC part is still time consuming. To overcome this situation and accelerate the study of cosmological gravitational wave sources, we have accommodated the JAX...
Go to contribution page -
Federico Pozzoli (University of Insubria, Como)19/06/2024, 15:45
Detecting stochastic gravitational wave backgrounds (SGWBs) with the Laser Interferometer Space Antenna (LISA) is one of the mission's scientific objectives. Disentangling SGWBs of astrophysical and cosmological origin is a challenging task, further complicated by the limited instrumental noise knowledge.
Various algorithms for simultaneous fit of noise and signal exist in literature,...
Go to contribution page -
Dr Martina Toscani (Università degli Studi di Milano Bicocca)19/06/2024, 16:30
-
Alice Garoffolo19/06/2024, 17:00
An intriguing aspect of gravitational wave lensing is the emergence wave-effects: interference and diffraction patterns in the waveforms due to finite size effects, occurring when the wave’s wavelength is comparable to the Schwarzschild radius of the lens.
Go to contribution page
These phenomena are particularly interesting because they induce frequency dependent modifications in the waveforms, allowing for a... -
Lorenzo Valbusa Dall'Armi19/06/2024, 17:15
The anisotropies of stochastic gravitational wave backgrounds (SGWB) of both cosmological and astrophysical origin retain precious information on the geometry and the content of the Universe at early times.
Go to contribution page
In this talk we present some test of statistical isotropy which can be conducted by observations of SGWB alone and in cross-correlation with other cosmological observables, such as the... -
Henri Inchauspé19/06/2024, 17:30
Next-generation gravitational wave detectors hold the capability to track unresolved gravitational waves bundled into a stochastic background. This composite background contains cosmological and astrophysical contributions, the exploration of which offers promising avenues for groundbreaking new insights into very early universe cosmology as well as late-time structure formation. However, such...
Go to contribution page -
Jani Dahl19/06/2024, 17:45
A key determinant of the intensity of GWs from a first order phase transition is the lifetime of the acoustic turbulence which follows. We have simulated acoustic turbulence in three dimensions using a highly optimized Python code and study the decay of the shocks and derive simple functional forms for the time evolution of the kinetic energy and the integral length scale at late times using...
Go to contribution page -
Jeremy Wachter (Wentworth Institute of Technology)20/06/2024, 14:30
We present results of gravitational backreaction applied to a realistic population of cosmic strings. Backreaction smooths strings and reduces the rate of energy loss, $\Gamma$. This smoothing does not give rise to strong cusps, with cusp-like behavior subdominant until at least modes $n\sim 10^6$. Backreaction generally causes strings to self-intersect, but the intersections typically involve...
Go to contribution page -
Amelia Drew20/06/2024, 14:45
Cosmic strings are topological defects that arise in particle physics models with a spontaneously broken U(1) symmetry, motivated, for example, by the Peccei-Quinn mechanism. Global strings are predicted to radiate massless dark matter axions, massive particles and gravitational waves. If we are to detect these strings via gravitational waves, or to detect axion dark matter in the cosmological...
Go to contribution page -
Lorenzo Speri (Max Planck Institute for Gravitational physics)20/06/2024, 15:00
-
Sebastian Ellis (Universite de Geneve (CH))20/06/2024, 15:30
-
Nicola TAMANINI (L2IT / CNRS)20/06/2024, 16:30
-
Juan Urrutia (KBFI)20/06/2024, 17:00
Gravitational wave timbre, the relative amplitude and phase of the different harmonics, can change due to interactions with low-mass halos. We focus on binaries in the LISA range and find that the integrated lens effect of cold dark matter structures can be used to probe the existence of Mv ≲ 10 M⊙ halos if a single binary with eccentricity e = 0.3−0.6 is detected with a signal-to-noise ratio...
Go to contribution page -
Matteo Tagliazucchi (University of Bologna)20/06/2024, 17:15
Gravitational waves (GWs) from compact binary coalescences are standard sirens that can probe the cosmic expansion history of the late-time Universe if the source redshift is known. Methods for injecting redshift information into the inference process range from the direct detection of electromagnetic counterparts ("bright sirens") to the use of statistical properties inferred either from a...
Go to contribution page -
Dr Andreas Mantziris (University of Porto)20/06/2024, 17:30
The prospect of primordial gravitational waves (GW) offers a promising new window for inflationary cosmology and particle physics. In our study 2309.08530, we investigated the evolution of the potential of a minimal scalar BSM extension at the end of inflation. More specifically, we focused on the transition from the potential-dominated de Sitter epoch to the kinetic dominated period of...
Go to contribution page -
Morais Morais (Universidade de Aveiro)20/06/2024, 17:45
Despite the tremendous success of the Standard Model (SM) with its properties remarkably well measured, there is overwhelming phenomenological evidence that strongly suggests the need for physics beyond the current SM, such as explanations for dark matter and neutrino masses. In this presentation we will discuss LISA's potential to reveal further evidence of new physics phenomena through...
Go to contribution page -
José Ricardo Correia20/06/2024, 18:00
In many extensions of the Standard Model of particle physics, there would have been first order phase transitions in the early Universe, producing a stochastic background of gravitational waves. This talk reports on large-scale numerical simulations of gravitational wave production at strong phase transitions, seeking to understand the characteristic spectra of the evolving compressional and...
Go to contribution page -
Dr Ville Vaskonen20/06/2024, 18:15
Strongly supercooled phase transitions cause a period of thermal inflation. Such first-order phase transitions typically generate a strong primary gravitational wave background from bubble collisions. In this talk, I will show that if the transition is also slow it leads to the formation of large inhomogeneities that source a secondary gravitational wave background. For sufficiently slow...
Go to contribution page -
Mark Hindmarsh (University of Helsinki)
Choose timezone
Your profile timezone: