9th LISA Cosmology Working Group Workshop

Session

LISA CosWG Workshop day 2

9 déc. 2021, 15:00

26. Review of new LVK cosmology results from O3

Simone Mastrogiovanni

09/12/2021 15:00

27. Extreme Mass-Ratio Inspirals as dark standard sirens

Danny Laghi (L2I Toulouse, CNRS/IN2P3)

09/12/2021 15:20

28. Multi-band gravitational wave cosmology with stellar origin black hole binaries

Niccolò Muttoni (L2IT Toulouse, CNRS/IN2P3)

09/12/2021 15:30

25. Stochastic GW background mapping

Mandic Vuk

09/12/2021 15:40

36. The recent excess noise observed by PTAs

Neil Cornish

09/12/2021 16:00

13. CosWG projects updates

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 Baker

09/12/2021 16:20

23. CosWG projects updates

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 Baker

09/12/2021 17:05

14. Discussion on CosWG projects rules and procedures

09/12/2021 17:20

37. Turbulent production of polarized gravitational radiation from primordial helical magnetic fields

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...

38. Gravitational waves from first-order phase transitions: A hybrid simulation, and signal enhancement from density perturbations

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...

39. Gravitational waves from bubble collisions in first order phase transitions

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.

40. Electroweak bubble wall expansion: gravitational waves and baryogenesis in Standard Model-like thermal plasma

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...

12. Contributed talks

15. Contributed talks

22. Multi-band gravitational wave cosmology with stellar origin black hole binaries

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...