The Low Frequency Array enables studies of low-frequency carbon radio recombination lines with unprecedented sensitivity, spectral and spatial resolution.

The thesis deals with the study of giant radio galaxies (GRGs), which are radio galaxies of megaparsec sizes.

Promotores: F.H. van Lunteren, F.P. Israel

This thesis explores the theoretical and observational properties of distant massive galaxies that harbour active black holes in their centres and shine brightly at radio wavelengths.

This thesis focuses on the study of transient and variable radio sources in the universe.

Promotor: H.J.A. Röttgering, Co-promotor: G.K. Miley

The origin and evolution of galaxies are closely tied to the cyclic feedback processes between stars and the interstellar medium (ISM).

One of the key quests in astronomy is to study the growth and evolution of galaxies across cosmic time. Radio observations provide a powerful means of studying the formation of stars and subsequent buildup of distant galaxies, in a way that is unbiased by the presence of dust.

A century ago, it was unclear whether the stars in the sky were clustered in groups, or widely spread in the universe.

Promotor: Prof.dr. A.G.G.M. Tielens, Co-Promotor: J.B.R. Oonk

It has now been well established that shocks and turbulent motions in the intra-cluster medium (ICM) generated through cluster mergers can produce large-scale synchrotron emission.

Pulsars were first discovered in 1967 and since then the population has grown and expanded over several wavelengths.

Promotor: Prof.dr. H. J. A. Röttgering, Co-Promotor: Dr. M. Haverkorn

Physics and Engineering Approaches to Biomedicine and Pharmacology

Current research at the Skin Barrier and Vaccination group.

Promotor: H.J.A. Rottgering, Co-Promotor: R.J. van Weeren

Promotor: Prof.dr. F.S. de Boer, Co-promotor: D. Clarke

After almost twenty years the record for the most distant radio galaxy has been broken. A team of astronomers led by Leiden PhD candidate Aayush Saxena has discovered a radio galaxy from the time when the universe was just one billion years old. The galaxy is at a distance of 12 billion light years…

The success of Dutch radio astronomy in the last century was largely due to Leiden astronomer Jan Hendrik Oort. He made astute use of circumstances in the post-war period. Historian Astrid Elbers' research focuses on this golden period.

Ineke van der Ham gives a radio interview at Radio 1.

Promotor: J.S. Kaastra Co-promotor: E. Constantini

Radio New Babylon, to be heard around Anna van Beurenplein, Den Haag, from 1-10-2021 onwards, is a collection of sound works by local and international artists inspired by the work of Constant Nieuwenhuys, and developed in the context of the Interdisciplinary Research Group (ACPA, KC, KABK).

No more lectures and exams for the Radio Astronomy course taught by Michiel Brentjens. The corona crisis is a moment of reflection that has changed his whole way of teaching. Instead of being in front of the class, he lets his students build a radio telescope with paint cans.

Source: Biosens Bioelectron, Volume 74, pp. 233-42 (2015)

Description of Triple bottom line approach for risk-benefit analysis of genetically modified crops.

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The Dutch atlas with pesticides concentrations in surface waters have been overhauled. This new, free accessible, website is in line with the European Framework Directive on Water (In Dutch: KRW).

The LOFAR radio telescope produces petabytes of data every year. Radio Astronomers use complex multi-step pipelines to process this data and produce scientific images.

PhD Defence

Last Saturday, Reijer Passchier was a guest on one of his favourite radio programmes: Dr. Kelder en Co.

By a stroke of luck, a team led by Dutch PhD student Martijn Oei has discovered a radio galaxy of at least 16 million lightyears long. The pair of plasma plumes is the largest structure made by a galaxy known thus far. The finding disproves some long-kept hypotheses about the growth of radio galaxie…

Vast, often populated, areas in dryland ecosystems face the dangers of desertification.

This article on private active cyber defense by Dennis Broeders is part of a special issue of the Journal of Cybersecurity, based on a selection of contributions taken from the 2019 Conference on Cyber Norms organized by The Hague Program for Cyber Norms.

The parliamentary elections in the Netherlands, scheduled for March 2017, are likely to result in a fragmented parliament and a complicated coalition formation process, according to Dutch political scientist Hans Vollaard (Leiden University).

The publication in Nature Ecology & Evolution about the so-called Siberian unicorns took centre stage in a Dutch radio interview.

On 25 April 2016, Suliman Ibrahim, Senior Researcher at the VVI, was a guest expert on the weekly radio program: 'Huna Libya', a joint initiative by the Libyan al-Wasat Radio and Radio Netherlands Worldwide (RNW).

BNR Radio has broadcast an item on the physics formulas that are painted on walls across the Leiden historic city center. The wall formulas are initiated by Sense Jan van der Molen and Ivo van Vulpen.

Physicist Joost Frenken was interviewed on the radio show 'Langs de Lijn en Omstreken' (Radio 1) about the recent discovery of superconductive graphene. The one-atom-thick material was already known for its strength, flexibility, lightweight and good conductivity.

In this thesis, we use low-frequency and high-frequency radio observations to address the following questions regarding quasars: is the radio loud/quiet quasar dichotomy real?

On Tuesday June 14th, Dr. Armin Cuyvers of Leiden Law School discussed the legal consequences of a possible Brexit in the radio program Juridische Zaken (Legal Matters) of Business News Radio (BNR).

Anthropologist Bart Barendregt is participating in a new Indonesian study program that focuses entirely on the Indonesian digital society. The Radio 1 NPO program Focus interviewed Barendregt 'live' from Java about his research on social media, Islam and boy bands.

Joris Larik was interviewed by BBC World Service radio on the state of Brexit negotiations, the Irish border issue and ongoing Dutch preparation.

Somali archaeology in Somaliland takes centre stage in a BBC World Service radio programme and a China Global Television Networks (CGTN) programme, both presented by archaeologist Sada Mire.

In Indonesië zijn studenten massaal in opstand gekomen tegen de regering, die vlak voordat er straks een nieuw parlement aantreedt, nog snel een aantal nieuwe wetten wil doorvoeren.

The recent trade dispute between the U.S. and China has renewed the attention for the dependency of the U.S. and many other developed countries on the imports of critical materials. Recently this has led to an initiative by the U.S. government to team up with resource rich countries like Australia and…

Tanja Masson-Zwaan, an assistant professor at the Institute of Air and Space Law, spoke on Friday 14 April about space mining on BBC Radio.

On Friday morning, 8 June, Thijs Bosker, Associate Professor at Leiden University College, was interviewed by NPO Radio 1 on plastic pollution in Antartctica: ''Anually, an additional 4 - 12 billion kilos of plastic ends up in our ocean''.

Together with colleagues and students, Professor of conservation biology Geert de Snoo studies the decline of the lion population in a national park close to Kenia's capital city, Nairobi. He discusses how they try to protect the lions on radio Sleutelstad FM.