This weeks's PhDCol
Speaker: Christian Groeneveld ()
Title: ''Galaxy clusters in the decametre sky''
Many galaxy clusters exhibit bright diffuse radio emission that traces
the underlying structure of the intracluster medium (ICM). Determining
the properties and uncovering the origin of this diffuse emission are
essential for understanding the fundamental physics of the plasma in
galaxy clusters. In particular, observations of diffuse emission in
galaxy clusters provide unique insights into magnetic fields permeating
the ICM, the merger history, and the nature of the relativistic
electron plasma resulting from ancient AGN outbursts. nDetecting
diffuse radio plasma in a large sample of galaxy clusters requires
deep, high-sensitivity observations with sufficient angular resolution
to accurately subtract compact sources. This is now feasible thanks to
the Low-Frequency Array (LOFAR). In particular, the low-band antenna
(LBA) allows us to observe diffuse emission at ultra-low radio
frequencies. In this presentation, we present novel calibration
strategies that allow us to reduce LOFAR LBA data at unprecedented low
frequencies (between 10-30 MHz), as well as LOFAR LBA data with
international baselines.
Date: Monday 2025-06-02
Time: 13:15
Location: BE 0.18
Host: