A prominent research theme at ASTRON involves the study of Cosmic Dawn (CD) and Epoch of Reionization (EoR) with LOFAR. These eras span the first billion years of the Universe’s history when the first stars and galaxies appeared and died, forming the first elements that make up everything that we see around us today. This period in the history of the Universe remains the least explored. Advancing our understanding of this early universe has been a primary motivation for the construction of the Square Kilometre Array.

Searching the 21-cm line

LOFAR is searching for the 21-cm line signal from diffuse neutral hydrogen between 110 and about 200 MHz, corresponding to a Cosmic time between 400 and 900 million years after the Big-Bang. More recently, the AARTFAAC system on LOFAR is also being used to search for similar signal from the earlier cosmic dawn epoch, about 200 million years after the big bang.

Most of the current group members are based at ASTRON and the Kapteyn Astronomical Institute of the University of Groningen, but the team involves members from e.g. the UK, Germany and Sweden.

Research staff

Andre Offeringa

Harish Vedantham

Latest tweets

Burgemeester @JagerRikus van @gem_westerveld nam deze mooie nieuwjaarstoespraak o.a. bij ASTRON op!

Hij noemt o.a. ons nieuwe #WDL (https://lnkd.in/ezv4JgiD), onze nieuwe directeur @astroTui en waardering voor de mensen met een afstand tot de arbeidsmarkt die bij ons werken.

Daily Image of the Week: Two ERC Starting Grants awarded to (space) weather research projects with the LOFAR radio telescope https://bit.ly/3zXd1kD

Deadline for applications for our summer research proramme is 31 January 2022!

For all information see https://www.astron.nl/education/summer-research-programme/ or the AAS website: https://jobregister.aas.org/ad/87949f20

🎉We are proud! Two ERC Starting Grands awarded to ASTRON employees Brian Hare & Harish Vedantham!

One project will use @LOFAR to create detailed images of lightning, the other aims to detect space weather events & magnetic fields around exoplanets: https://bit.ly/3fd9FjC

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