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Nordic-Baltic Astronomy Days 2026

26–29 May 2026
Radisson Blu Marina Palace Hotel
Europe/Helsinki timezone

Session

26-C1: Cosmology

Tu-06C
26 May 2026, 13:15
Room C

Room C

Description

Chair: Maret Einasto

Presentation materials

There are no materials yet.

  1. 233. Cosmological N-body simulations in trivial and non-trivial topological manifolds with StePS
    Gabor Racz (University of Helsinki)
    26/05/2026, 13:15
    Oral

    In cosmology, N-body simulations are a fundamental computational tool used to track the non-linear growth of cosmic structures. While the global topology of our Universe is still an open question, cosmological N-body simulations are almost exclusively run in a non-trivial T^3 (3-torus) topology due to a mere numerical convenience. In this talk, I will demonstrate how the choice of a global...

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  2. 234. Determining Cosmic Enviroments from Galaxy Properties
    Zoe Rhiannon Jones (Tartu Observatory)
    26/05/2026, 13:30
    Oral

    We explore the relationships between the cosmic environments of galaxies and their own physical properties through large-scale statistics, with the ultimate goal of being able to predict a galaxy's most likely cosmic environment from its SED and properties alone. To do so, we are developing a tool to compare the SEDs of large samples of galaxies in order to find similarity between them. We...

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  3. 235. Modelling the thermal and kinetic Sunyaev–Zel'dovich effects in HalfDome simulations
    Kristers Nagainis (Institute of Astronomy, University of Latvia)
    26/05/2026, 13:45
    Oral

    The thermal and kinetic Sunyaev-Zel'dovich effects (tSZ and kSZ, respectively) are the secondary anisotropies of the cosmic microwave background (CMB). Even though these effects are difficult to distinguish in CMB observations, they have been detected by Planck and the Atacama Cosmology Telescope (ACT).
    tSZ and kSZ carry extensive information about the underlying cosmology and structure...

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  4. 236. Physical interpretation of the IGM parameters of the 21-cm power spectrum from cosmic reionization
    Ivelin Georgiev (Stockholm University)
    26/05/2026, 14:00
    Oral

    During the Epoch of Reionization (EoR), the ultraviolet radiation from the first stars and galaxies ionized the neutral hydrogen in the intergalactic medium (IGM), which can emit radiation through the 21-cm hyperfine transition. Due to this, the 21-cm signal from the EoR is a direct probe of the IGM and the first ionizing sources, and its measurement is a key science priority of radio...

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