Matthias Ehle



Main Research Fields

The research I am doing is part of an comprehensive approach involving multi-wavelength (X-ray and radio continuum) high-sensitivity observations of a sample of actively star-forming nearby galaxies:

It is still a matter of debate how the halo gas is ionized and heated: are these processes taking place in the disk and is the gas transferred into the halo afterwards, or is the halo gas of neutral origin and ionized by star-formation in the disk and/or by heating processes which are working in the halo? In addition, comparing energy densities of magnetic fields and thermal gas can address the question of how important magnetic fields are for the dynamics and evolution of galactic halos.

More recently I started to expand the study of extra-planar gas and magnetic fields on cluster spiral galaxies. Frequently, these objects are found to be affected by ram pressure stripping or tidal interactions as they travel through the cluster intergalactic medium.


  • The Environment of Galaxies
  • Galactic Halos
  • Cosmic Magnetic Fields
  • Interstellar and Intergalactic Medium
  • Clusters of Galaxies

Ongoing collaborations

  • Ruhr-Universität Bochum (Ralf-Jürgen Dettmar)
  • MPE Garching (Frank Haberl, Wolfgang Pietsch (emer.))
  • MPIfR Bonn (Rainer Beck)
  • Jagiellonian University Cracow (Marek Wezgowiec, Marek Urbanik)



Project/mission at ESA

INTEGRAL, XMM-Newton, Athena Study