More Science Highlights

Some more LOFAR-related highlight publications by GLOW members

Recent LOFAR Highlights

The LOFAR telescope allows to study the low frequency radio sky with unprecedented resolution and sensitivity. Here we feature recent results with significant contribution from GLOW researchers.

  • Plasma in galaxy clusters

    On the largest scales, the Universe consists of voids and filaments making up the cosmic web. Galaxy clusters are located at the knots in this web, at the intersection of filaments. Regions of diffuse radio emission are thought to trace relativistic electrons in the intracluster plasma accelerated by low-Mach-number shocks. A long-standing problem is how low-Mach-number shocks can accelerate electrons so efficiently to explain the observed radio relics. Here, we report the discovery of a direct connection between a radio relic and a radio galaxy. This discovery indicates that fossil relativistic electrons from active galactic nuclei are re-accelerated at cluster shocks. It also implies that radio galaxies play an important role in governing the non-thermal component of the intracluster medium in merging clusters. Researchers at the University of Hamburg led the interpretation of the results. [Publication: van Weeren et al.: The case for electron re-acceleration at galaxy cluster shocks, In: Nature Astronomy, Vol. 1, 2017]

    Radio emission in the galaxy cluster Abell 3411