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First Nordic Cosmology Meeting

23–25 Oct 2023
Albano Campus
Europe/Stockholm timezone

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Session

Invited Talks Session

23 Oct 2023, 11:10
Lecture Room 17 (Albano Building 2)

Lecture Room 17

Albano Building 2

Conveners

Invited Talks Session

  • Oksana Iarygina (Stockholm University, Nordita)

Invited Talks Session

  • Florian Niedermann (Stockholm University, Nordita)

Invited Talks Session

  • Pierluca Carenza (Stockholm University)

Presentation materials

There are no materials yet.

  1. 1. Inflationary tails, and other multi-field stories
    Ana Achúcarro
    23/10/2023, 11:10

    Motivated by primordial black holes as an observational window into primordial spectra on sub-CMB scales, I will discuss some interesting properties of the perturbations generated during multi-field inflation.

    Among them: power spectrum features, non-gaussianity — or otherwise — of small perturbations, and the statistics of large, rare, curvature fluctuations ("non-gaussian tails").

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  2. 2. The dark bubble model – how to get dark energy from string theory
    Ulf Danielsson
    23/10/2023, 11:55

    I review the dark bubble model, its connection to quantum cosmology and how the cosmological constant can be computed in terms of other fundamental scales.

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  3. 3. A simultaneous solution to the H0 and the S8 tensions and the implication for inflation
    Martin S. Sloth
    24/10/2023, 09:30

    I will discuss the requirements of a successful simultaneous solution to the Hubble and the S8 tension; why it requires new dark physics at the eV scale, and why New Early Dark Energy (NEDE) is a particularly simple and minimalistic framework for such solutions. I will then explain why this class of successful solutions to the tensions implies a more blue initial spectrum of primordial...

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  4. 4. Gravitational waves from early universe phase transitions
    David Weir (University of Helsinki)
    24/10/2023, 10:15

    Many extensions of the Standard Model of particle physics predict that one or more phase transitions took place in the early universe. Such phase transitions involve the nucleation, expansion, and collision of bubbles of the new phase. These collisions (and associated interactions of sound waves in the plasma) are substantial, potentially detectable, sources of gravitational waves. As a...

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  5. 5. CMB observations - mapping the sky from the Milky Way to the Big Bang
    Ingunn Kathrine Wehus (University of Oslo)
    24/10/2023, 11:00

    The cosmic microwave background (CMB) gives us information about the earliest history of the Universe, close after the Big Bang. After half a century of more and more sensitive CMB observations, from ground, space and balloons, we now have dozens of valuable data sets available. Each of these has their own strengths and weaknesses, including sensitivity, resolution, frequency bands, sky...

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  6. 6. Recent developments in axion physics.
    David Marsh (Stockholm University)
    25/10/2023, 09:30
  7. 7. Bayesian Forward Modelling of Galaxy Surveys
    Jens Jasche (Stockholm University)
    25/10/2023, 10:15

    The standard model of cosmology predicts a rich phenomenology to test the fundamental physics of the origin of cosmic structure, the accelerating cosmic expansion, and dark matter with next-generation galaxy surveys. However, traditional data analysis methods focus on limited statistical summaries and overlook important information in the complex filamentary distribution of cosmic matter in...

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