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KEK Cosmo 2025

2–5 Mar 2026
Asia/Tokyo timezone

Session

Session I

5 Mar 2026, 09:10

Conveners

Session I

  • Kazuyuki Akitsu

Presentation materials

There are no materials yet.

  1. 20. Intrinsic galaxy alignment cosmology
    Teppei Okumura
    05/03/2026, 09:10
  2. 21. Probing Light Dark Matter with Cosmic Gravitational Focusing
    Liang Tan
    05/03/2026, 10:10

    We investigate the possibility of using the cosmic gravitational focusing (CGF) to probe the minor light dark matter (DM) component whose mass is in the range of $(0.1 \sim 100)$\,eV. Being a purely gravitational effect, the CGF offers a mode-independent probe that is complementary to the existing ways such as Lyman-$\alpha$ and $\Delta N_{\rm eff}$. Such effect finally leads to a dipole...

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  3. 22. Constrain the Dark Matter physics through weak lensing observation
    Lei Zu
    05/03/2026, 10:30

    Dark matter non-gravitational interactions can modify the evolution of cosmological perturbations in the early Universe, leaving observable imprints on large-scale structure. In this talk, I will introduce several studies that use weak-lensing measurements of the matter distribution—probing scales around k~1h/Mpc—to constrain dark matter interactions.

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  4. 23. Exponential Quintessence Model: Analytical Quantification of the Fine- Tuning Problem in dark energy
    Naoto Maki
    05/03/2026, 10:50

    We explain the data of the DESI galaxy survey by
    using theoretical models of time-varying dark energy. Among such
    models, a quintessence field with the exponential potential is an
    attractive candidate for inducing time-varying dark energy. We
    analytically derive constraints on initial conditions that allow the
    kination epoch in the early Universe without conflicting with big
    bang...

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