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Nordic-Baltic Astronomy Days 2026

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

Session

26-C3: Cosmology + Outreach

Tu-10C
26 May 2026, 16:15
Room C

Room C

Description

Chair: Pasi Nurmi

Presentation materials

There are no materials yet.

  1. 259. The challenge of the largest structures in the Universe
    Maret Einasto (Tartu Observatory, Tartu University)
    26/05/2026, 16:15
    Oral

    Understandng the properties, formation and evolution of the cosmic web is one of the main tasks
    in cosmology.
    In my talk I introduce the largest structures in the cosmic web, and the compatibility
    of these structures with the LCDM cosmolocigal model.
    Namely, in the Local Universe the richest structures in the cosmic web are very rich galaxy superclusters
    and their compelxes - the Sloan...

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  2. 260. From image position to extended image modeling in the era of JWST: next-generation strong lens mass models of galaxy clusters
    Stefan Schuldt (FINCA)
    26/05/2026, 16:30
    Oral

    Strong gravitational lensing by galaxy clusters is a powerful tool to probe various properties of the Universe. It enables precise reconstructions of cluster mass distributions, detailed studies of high-redshift galaxies through lensing magnification, and measurements of cosmological parameters such as the Hubble constant, H0, using time-variable strongly lensed sources such as SN Refsdal in...

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  3. 261. J-PAS&FLAMINGO: Tracing Cosmic Voids and Void Galaxies in the Gravitational Landscape of Photometric Surveys
    Jad Mansour (Tartu Observatory, University of Tartu)
    26/05/2026, 16:45
    Oral

    Cosmic voids are sensitive probes of galaxy formation and evolution, but their identification in photometric surveys is complicated by redshift uncertainties. In this work, we simulate the observational limitations of the J-PAS photometric survey by modelling photometric redshift errors based on the J-PAS Internal Data Release using the FLAMINGO hydrodynamical simulation. We construct two...

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  4. 262. Brightest group and cluster galaxies as indicators of relaxation
    Kelly Kelder (University of Tartu; University of Turku)
    26/05/2026, 17:00
    Oral

    Galaxy groups and clusters are some of the most massive gravitationally bound structures in the Universe. Located at the nodes of the cosmic web, these systems are laboratories for analysing theories of both galaxy evolution and cosmology. In such models, groups and clusters provide an excellent tool for constraining cosmological parameters through their mass functions. However, this approach...

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  5. 263. The Stars Belong to Everyone! Communicating Astronomy in Finland
    Anne Liljeström (Ursa Astronomical Association)
    26/05/2026, 17:15
    Oral

    Finland has a long history of communicating astronomy to the public. Finland also (allegedly!) has the largest number of amateur astronomers per capita in the world. The nationally operating Ursa Astronomical Association is currently the most active and versatile it’s ever been during its over a hundred years of activities.

    We must be doing something right! So what have we been doing?...

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