Gravitational-Wave Primordial Cosmology

Liste des contributions

1. Welcome

Sébastien Renaux-Petel (IAP-CNRS)

17/05/2021 14:00

2. Cosmology with LISA

Chiara Caprini

17/05/2021 14:10

3. Measuring the net circular polarization of the stochastic gravitational wave background with interferometers

Lorenzo Sorbo

17/05/2021 14:40

4. Stochastic Gravitational Wave Backgrounds (SGWB) characterization with LISA

Mauro Pieroni

17/05/2021 15:10

In this talk I will discuss Stochastic Gravitational Wave Backgrounds (SGWB) characterization with LISA. After a general introduction on SGWB detection, I will explain the peculiar features of LISA with a focus on the response function and on the noise spectrum. The core of my talk will be the presentation of two different methods for model independent SGWB frequency reconstruction:
- The...

35. Open discussion

17/05/2021 15:40

5. Gauge Fields in Inflation, Origin of Matter, and Gravitational Waves

Azadeh Maleknejad

17/05/2021 16:30

Modern cosmology inevitably involves particle physics beyond the Standard Model to explain long-standing puzzles: the origin of matter asymmetry, nature of dark matter and cosmic inflation. In this talk, I will explain that gauge fields in inflation can possibly solve and relate these seemingly unrelated mysteries of modern cosmology. As a smoking gun, this setup has robust observable...

6. Probing the Early Universe Particle Content with Primordial Messengers

Matteo Fasiello

17/05/2021 17:00

Some of our best ideas on early universe physics are about to be put to the test by an unprecedented array of cosmological probes. The data these will collect span a vast range of scales, from the CMB to large scale structure, from pulsar timing arrays all the way to laser interferometers. This combined wealth of new information holds the potential to transform not just our understanding of...

22. Testing inflation with small-scale anisotropies

Ema Dimastrogiovanni

17/05/2021 17:30

Inflation predicts a stochastic background of gravitational waves. In this talk I will discuss how anisotropies in the gravitational wave energy density can be a powerful tool in characterizing the inflationary GW background and potentially distinguishing it from backgrounds due to other sources.

40. Open discussion

17/05/2021 18:00

34. Probing gravitational waves using spectral distortions

Subodh Patil

18/05/2021 13:30

CMB anisotropies probe primordial gravitational wave backgrounds of frequencies between 10^{-18} and 10^{-15} Hz. Pulsar timing arrays begin to be sensitive to backgrounds starting in the nano-hertz regime, seemingly leaving an approximately six decade gap in frequency coverage. This talk will discuss how spectral distortions of the CMB covers this gap in a meaningful way, and discuss various...

23. Features in the stochastic gravitational wave background from two-field inflationary models.

Matteo Braglia

18/05/2021 14:00

24. Oscillations in the stochastic gravitational wave background from small-scale features

Lukas Witkowski

18/05/2021 14:30

25. Observing primordial GWs from excited states

Spyros Sypsas

18/05/2021 15:00

36. Open discussion

18/05/2021 15:30

26. Probing the Physics of Inflation with Gravitational Wave Experiments

Gianmassimo Tasinato

18/05/2021 16:30

27. Imprints of Primordial Non-Gaussianity on Gravitational Wave Spectrum

Caner Ünal

18/05/2021 17:00

I will talk about the imprints of small, mild and large primordial local NG in density perturbations on the induced GW spectrum.

28. Are induced GWs gauge dependent?

Guillem Domènech

18/05/2021 17:30

37. Open discussion

18/05/2021 18:00

29. NANOGrav 12.5-yr result and induced gravitational waves

Shi Pi

19/05/2021 14:00

I will briefly review the properties of SGWB induced by the scalar perturbation, as well as its connection to the primordial black holes (PBHs). NANOGrav reported the discovery of a common-spectrum process of the time residuals in their 12.5-yr data set of pulsar timing array, which might be the first detection of nano-hertz SGWB. Based on the recent developments on the spectral shape of SGWB,...

30. Primordial Nano Black Holes

Antonio Riotto

19/05/2021 14:30

31. Primordial Black Holes: gravitational-wave signatures and possible contribution to the dark matter

Sebastien Clesse

19/05/2021 15:00

The detection of gravitational-waves from binary black hole mergers has rekindled the idea that primordial black holes may have formed in the early Universe. I will review some recent developments in the field of primordial black holes: formation mechanisms, mass function, astrophysical limits, possible contribution to the Dark Matter and links to the Baryogenesis. I will particularly focus...

38. Open discussion

19/05/2021 15:30

32. Deformation of the gravitational wave spectrum by density perturbations

Jinno Ryusuke

19/05/2021 16:30

In recent years, the possibility of having large density perturbations at high wavenumbers has been actively studied, especially in the study of primordial black holes (PBHs). In this presentation, we point out that such density perturbations affect any pre-existing gravitational wave (GW) spectrum through CMB-like effects. Since GWs produced in the early universe propagate through the density...

33. Probing the 'primordial dark ages’ with gravitational waves. Implications for reheating.

Daniel Figueroa

19/05/2021 17:00

39. Guided discussion

19/05/2021 17:30