Filaments in the multi-scale Universe: understanding their role and detectability
Meeting Dates & Venue
October 26-30, 2026
Kavli IPMU, Kashiwa, Chiba, Japan
Important Dates (approximate)
- Abstract submission Opens: mid May 2026
- Abstract submission Closes: mid June 2026
- Notification of Contributed Talks: late June 2026
- Meeting dates: October 26-30, 2026
Registration will open soon!
Scientific Vision
Filaments are a fundamental part of the cosmic web. They connect galaxies, groups, and clusters across a wide range of scales, and they contain a large fraction of the matter and baryons in the Universe. Yet, compared to haloes, galaxies, and clusters, filaments are still poorly characterised.
The goal of this conference is to bring together different communities working on filamentary structures of the multi-scale web, and to reach a better understanding of the physical role of filaments in the Universe. What do filaments tell us about structure formation? How do they affect galaxies? How do baryons behave outside haloes? Which filament properties are robustly observable? And can the cosmic web become a new tool for cosmology?
Conference Objectives
This conference is designed to bring together researchers working on filaments from different perspectives, spanning theory, simulations, observations, reconstruction, galaxy evolution, gas physics, and cosmology.
In particular, the meeting aims to:
- discuss recent advances in our understanding of how filaments form, evolve, and connect different environments in the cosmic web;
- identify which filament and cosmic web observables can be used to test cosmology and fundamental physics;
- discuss how gas and baryons are distributed in filaments across cosmic time, and how their physical properties evolve with redshift;
- understand how the cosmic web affects galaxy and halo properties, including star formation, morphology, gas content, angular momentum, and assembly history;
- connect large-scale filaments with small-scale gas accretion, CGM physics, and galaxy fuelling;
- provide an updated view of how we map, reconstruct, detect, and characterise the web in simulations and observations, in light of new surveys, and recent developments in statistical, topological, and machine-learning tools; asses the robustness of these methods across tracers and scales;
- identify the main theoretical, observational, and methodological challenges for the next generation of filament studies.
We hope this meeting will serve not only as a forum for sharing recent results, but also as a discussion-oriented space where different communities can exchange ideas, build new collaborations, and develop a shared language and toolset.
Main Science Themes
- Cosmic web foundations: theory, morphology, and dynamics
- Filaments/cosmic web for cosmology and fundamental physics
- Halo & Galaxy evolution in the cosmic web: observations and simulations
- Galaxy fuelling, small-scale filaments, bayons, CGM in observations and simulations
- Mapping the web: reconstruction, constrained simulations, cosmography
- Detecting filaments accross scales: methods, tracers, robustness
Invited Speakers (confirmed)
|
Stefania Barsanti |
Wojtek Hellwing Polish Academy of Science |
|
Sandrine Codis |
Jounghun Lee Seoul National University |
|
Job Feldbrugge |
Christopher Martin |
|
Farhanul Hassan |
Charlotte Welker City University of New York |
|
Miguel Aragon-Calvo |
Ulrike Kuchner University of Nottingham |
The complete list of invited speakers is coming soon!
Scientific Organizing Committee (SOC)
- Daniela Galárraga-Espinosa (Kavli-IPMU), chair
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Nabila Aghanim (IAS)
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Elisa Ferreira (Kavli-IPMU)
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Clotilde Laigle (IAP)
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Khee-Gan Lee (Kavli-IPMU)
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Noam Libeskind (AIP)
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Jia Liu (Kavli-IPMU)
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Daisuke Nagai (Yale University)
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Jingjing Shi (Kavli-IPMU)
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John Silverman (Kavli-IPMU)
Local Organizing Committee (LOC)
- Daniela Galárraga-Espinosa
- Qi Guo
- Ben Horowitz
- Rahul Ramesh
- Takafumi Tsukui
- Can Xu