By Francesco de Gasperin and Timothy Shimwell

Supermassive black holes can leave a trail of energetic particles that astronomers are able to detect using radio telescopes.

Published by the editorial team, 15 June 2020

Usually, the radio emission from these particles fades away and become invisible as it ages. However, in the merging galaxy cluster Abell 1033, LOFAR discovered that some of these particles can be rejuvenated and start shining again when observed at very low radio frequencies. This re-energising process can occur because when cluster merge a huge amount of energy is dissipated — these merging events are the most energetic processes since the Big Bang.

With the help of LOFAR, astronomers want to study these particles, to learn about how galaxy clusters evolve in the Universe and how their evolution is influenced by magnetic fields and accretion.

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Daily image of the week

On June 13-17, the LOFAR Family Meeting took place in Cologne. After two years LOFAR researchers could finally meet in person again. The meeting brings together LOFAR users and researchers to share new scientific results.
https://www.astron.nl/dailyimage/main.php?date=20220621

Our renewed ‘Melkwegpad’ (Milky Way Path) is finished! The new signs have texts in Dutch on the one side and in English on the other side. The signs concerning planets have a small, 3D printed model of that planet in their centre.
https://www.astron.nl/dailyimage/
#Melkwegpad @RTVDrenthe

Daily image of the week

The background drawing shows how the subband correlator calculates the array correlation matrix. In the upper left the 4 UniBoard2s we used. The two ACM plots in the picture show that the phase differences of the visibilities vary from 0 to 360 degrees.

Daily image of the week: Testing with the Dwingeloo Test Station (DTS)
One of the key specifications of LOFAR2.0 is measuring using the low- and the highband antenna at the same time. For this measurement we used 9 lowband antenna and 3 HBA tiles.
https://www.astron.nl/dailyimage/main.php?date=20220607

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