9th LISA Cosmology Working Group Workshop

Session

LISA CosWG Workshop day 1

8 déc. 2021, 15:00

6. Status of the LISA mission

Antoine Petiteau (APC - Université Paris-Diderot), Martin Hewitson (AEI Hannover)

08/12/2021 15:00

7. LSG activities and Working Packages

Jon Gair

08/12/2021 15:30

8. Overview of LISA astrophysics WG white paper

Volonteri Marta

08/12/2021 16:00

9. Overview of LISA waveform WG white paper

Witek Helvi

08/12/2021 16:25

24. Overview of LISA Fundamental Physics white paper

Daniela Doneva

08/12/2021 17:05

10. Tools from the LDC and how to get involved

Quentin Baghi (NASA GSFC - USRA)

08/12/2021 17:30

30. Primordial gravitational-waves boosted by the axion

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...

31. Oscillations in the stochastic gravitational wave background from particle production during inflation

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.
I will show how...

32. Status of Bouncing Cosmology and possible observations with LISA

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.

33. Bridging the μHz gap in the gravitational-wave landscape with binary resonance

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...

34. Impact of LIGO-Virgo binaries on gravitational wave background searches

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.

35. Nonperturbative quantization of gravitational waves, and their signatures: a model

Saeed Rastgoo

08/12/2021 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...

11. Contributed talks