IAU Focus Meeting FM8:
New Insights in Extragalactic Magnetic Fields

August 29 – 31, 2018

Scientific Rationale:

Magnetic fields are a key ingredient of the extragalactic Universe on many different spatial scales, from individual galaxies and AGN to clusters of galaxies and large-scale structure, however they remain poorly understood. The coming years and decades will see a burst in our information and understanding of extragalactic magnetic fields due to the next generation of radio astronomy facilities, especially the SKA and its precursors, as well as major advances in MHD numerical simulations and algorithmic improvements to extract magnetism information from the databases. The Focus Meeting will bring together the observational, theoretical and computational communities to discuss the challenges and opportunities for understanding the magnetized universe from scales of galaxies to the cosmic web and connect information across the spectrum, to address the fundamental questions that are unanswered:
- What are the magnetic field strength and structure?
- How did magnetic fields form?
- How did they evolve and how are they maintained?
- How do they control the acceleration and dynamics of relativistic particles in astrophysical plasmas?
- How do magnetic fields affect the evolution of thermal plasmas in galaxies and clusters?
- How do magnetic fields illuminate otherwise invisible processes in the thermal plasma?
- How do magnetic field contribute to the origins and evolution of structures in the Universe, from galactic to cosmic web scales?


  • Origins of cosmic magnetism  
  • Magnetism across the electromagnetic spectrum
  • Magnetism of the early Universe
  • Magnetic field in galaxy clusters: observations, simulations and theoretical models
  • Magnetic fields in the intergalactic medium and in the cosmic web
  • Magnetic fields in spiral galaxies and radio galaxies
  • Capabilities of next generation telescopes for cosmic magnetism
  • Looking ahead: Magnetism in the SKA era, techniques and algorithmic advances




Abstract list for FM8
Poster list for FM8

Wednesday, 29. Aug.

Origins of cosmic magnetism and Magnetism in the early Universe
room: N
13:30 - Welcome
13:40 - Subramanian, Kandaswamy (Origins of cosmic magnetism)
14:00 - Enßlin, Torsten (The primordial magnetic field in our cosmic backyard)
14:15 - Beresnyak, Andrey (Intracluster magnetic field: primordial field or dynamo?)
14:30 - Yamazaki, Dai (CMB weak lensing with the primordial magnetic field)
14:40 - T. Kahniashivli (Magnetism in the early Universe)

Magnetism in the early Universe and Magnetism across the elecromagnetic spectrum
room: N
15:30 - Langer, Mathieu (Magnetizing the Intergalactic Medium during Reionization)
15:45 - Sokoloff, Dmitry (Small-scale dynamo as a mechanism for excitation of extragalactic magnetic Fields)
16:00 - Nagai, Hiroshi (What does ALMA tell us about extragalactic magnetic fields?)
16:20 - Barai, Paramita (Large-Scale Diffuse Intergalactic Magnetic Fields Constraints With the Cherenkov Telescope Array)
16:35 - de Gouveia Dal Pino, Elisabete (Propagation of Cosmic-Rays and Gamma-Rays in the turbulent Intergalactic Medium)
16:50 - Shukurov, Anvar (Energy equipartition between cosmic rays and magnetic fields) 


Thursday, 30. Aug.

Magnetic Fields in Galaxy clusters and Intergalactic medium and the web
room: N
10:30 - A. Bonafede (Magnetic field in galaxy clusters: observations, simulations and theoretical models)
10:50 - Hoeft, Matthias (The Toothbrush Radio Relic and Magnetic Fields in the Intracluster Medium)
11:05 - Nikiel-Wroczynski, Blazej ((Magnetised) Camel in the (intra-group) eye of a needle: the genuinely regular magnetic field inside the Stephan's Quintet)
11:15 - Ryu, Dongsu (A Simulation Study for Turbulence and Magnetic Fields in Galaxy Clusters)
11:30 - M. Brueggen (Magnetic fields in the intergalactic medium and in the cosmic web)
11:50 - Mckinven, Ryan (Constraints on extragalactic magnetic fields using diffuse galactic polarization)

Intergalactic medium and the web and Capabilities of next generation telescopes
room: N
13:30 - Gaensler, Bryan (First Results from Wide Field Extragalactic Polarisation Surveys)
13:45 - Johnston, Simon (Magnetic Fields in the Intergalactic Medium from observations of Fast Radio Bursts)
14:00 - Mao, Sui Ann (Magnetism in the SKA Era)
14:20 - Loi, Francesca (Simulations of the polarized sky of the SKA)
14:30 - Stil, Jeroen (Capabilities of next generation telescopes for cosmic magnetism)
14:50 - Ma, Yik Ki (From NVSS RM Catalogue to Future Polarisation Surveys)


Friday, 31. Aug.

Spiral galaxies and radio galaxies
room: N
13:30 - R. Laing (Magnetic fields in spiral galaxies and radio galaxies)
13:50 - Li, Hui (All Hands On Deck: Understanding Astrophysical Jets from Supermassive Black Holes via Observation, Theory, Simulation and Laboratory Experiment)
14:05 - Dettmar, Ralf-Juergen (A fresh look on magnetic fields in halos of spiral galaxies)
14:20 - Chamandy, Luke (New insights on galactic dynamos)
14:35 - Tabatabaei, Fatemeh (The Role of Magnetic Fields in Evolution of Galaxies)
14:50 - Kierdorf, Maja (Probing the Magnetized Disk-Halo Interaction in M51 via Wideband Polarimetry)

Spiral galaxies and radio galaxies and Looking Ahead: Techniques and Algorithms
room: N
15:30 - Sarazin, Craig (Magnetic Fields in Galaxies and Clusters of Galaxies in MHD Simulations)
15:45 - Ramos-Martinez, Mariana (Magnetic fields in simulations of ram pressure stripped galaxies)
15:55 - Basu, Aritra (Statistical properties of Faraday rotation measure from large-scale magnetic fields in intervening disc galaxies)
16:10 - Vacca, Valentina (Techniques and algorithmic advances in the SKA era)
16:30 - Rudnick, Lawrence (Isolating local from foreground Faraday contributions)
16:45 - Final Discussion/Poster presentations



  • George Heald (co-chair), CSIRO Astronomy and Space Science (CASS), Australia
  • Melanie Johnston-Hollitt (co-chair), Victoria University of Wellington, New Zealand
  • Federica Govoni (co-chair), INAF Osservatorio Astronomico di Cagliari, Italy
  • Nabila Aghanim, Institut d’Astrophysique Spatiale CNRS and Universite Paris-Sud, Orsay, France
  • Ruth Durrer, Departement de Physique Theorique, Université de Geneve, Geneve, Switzerland
  • Torsten Enßlin, Max Planck Institut für Astrophysik, Garching, Germany
  • Luigina Feretti (proposer), INAF Istituto di Radioastronomia, Bologna, Italy
  • Hui Li, Los Alamos National Laboratories, NM (USA)
  • Hiroshi Nagai, National Astronomical Observatory of Japan, Tokio, Japan
  • Lawrence Rudnick, Minnesota Institute for Astrophysics, University of Minnesota, USA



Luigina Feretti 


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