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Axions in Japan

10–14 Nov 2025
Kavli IPMU
Asia/Tokyo timezone

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Session

Parallel session - Cosmology III

14 Nov 2025, 13:40
Lecture Hall (Kavli IPMU)

Lecture Hall

Kavli IPMU

Kavli Institute for the Physics and Mathematics of the Universe, The University of Tokyo 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8583, Japan

Conveners

Parallel session - Cosmology III

  • Chair: Anamaria Hell

Presentation materials

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  1. 45. Diverse dark matter haloes in Two-field Fuzzy Dark Matter
    Hoang Nhan Luu
    14/11/2025, 13:40

    Fuzzy dark matter (FDM) is a compelling candidate for dark matter, offering a natural explanation for the structure of diffuse low-mass haloes. However, the canonical FDM model with a mass of 10^{−22} eV encounters challenges in reproducing the observed diversity of dwarf galaxies, except for possibly scenarios where strong galactic feedback is invoked. The introduction of multiple-field FDM...

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  2. 34. SPINN: Advancing Cosmological Simulations of Fuzzy Dark Matter with Physics Informed Neural Networks
    Ashutosh Kumar Mishra
    14/11/2025, 14:00

    Physics-informed neural networks (PINNs) have emerged as a powerful tool for solving differential equations by integrating physical laws into the learning process. This work leverages PINNs to simulate gravitational collapse, a critical phenomenon in astrophysics and cosmology. We introduce the Schrödinger–Poisson (SP) informed neural network which solves the nonlinear SP equations to simulate...

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  3. 36. Cosmology-informed constraints on the fuzzy dark matter mass from dwarf-spheroidal stellar kinematics
    Shunichi Horigome
    14/11/2025, 14:20

    Fuzzy dark matter (FDM) predicts a solitonic core within halos, in contrast to the cuspy inner profiles expected in the standard cold dark matter (CDM) model.
    We investigate differences in the inner structure of dark matter halos through the stellar kinematics of dwarf spheroidal galaxies, which place constraints on the FDM particle mass.
    We analyze the parameter space using a...

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  4. 35. Cosmological Zoom-in simulations of Fuzzy Dark Matter dwarf halos in the field
    Victor H. Robles
    14/11/2025, 14:40

    Ultra-light bosons are a promising candidate for the dark matter in the Universe. The quantum nature implies minimum halo mass scale below which structure formation is suppressed. The limited number of Self-consistent FDM simulations have reveal that non-linear collapse can yield soliton formation below the Jeans scale. In this talk, I will present a suite of FDM cosmological zoom-in...

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