Promotor: Prof.dr. J. Schaye, Co-promotor: Marcello Cacciato

Promotor: H.W. Lenstra

Our research is done at two different locations.

Promotor: Prof.dr. P. Stevenhagen, Co-Promotor: Dr. J.H. Evertse

Promotores: Prof.dr. J. Schaye, Prof.dr. S.D.M. White (MPA Garching)

Galaxies form and evolve through close interaction with their surroundings. As a result, the heavy elements ('metals') that are synthesized in stars, are found both inside and outside galaxies.

On Tuesday 19 December 2017 Anneloes Kuiper-Slendebroek defended her doctoral thesis 'Rechter over Grenzen' which deals with the application and interpretation of international law in Dutch private law. Supervisor is Martijn Polak, co-supervisor is Jeroen van der Weide.

Promotor: S.J. Edixhoven

Promotor: J. Schaye

We investigate the buildup of galaxies from various vantage points. The first two chapters focus on the stellar content of galaxies, especially the distribution of stellar masses at birth and potential variations therein in various galactic environments.

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

When a star gets too close to a supermassive black hole, it is torn apart by strong tidal forces in a tidal disruption event (TDE).

Promotor: S.J. Edixhoven Co-promotor: L. van Geemen, P. Parent

On 12 January 2022, Mirjam Franke defended the thesis 'Over de grens van de onrechtmatige daad'. The doctoral research was supervised by Prof. A.G. Castermans and Prof. J.H. Crijns.

Dit rapport maakt deel uit van het project Receptenboek burgerparticipatie in opdracht van de Rijksdienst voor het Cultureel Erfgoed (RCE) en met steun van het Fonds voor Cultuurparticipatie.

How did the medieval manuscript develop as a physical object during the Twelfth Century Renaissance and what do these changes tell us about the intellectual culture of the period?

Leiden Observatory is going to use a new technique to carry out calculations on gravitational lensing measurements. They will do this is the context of research into the formation of elliptical galaxies. Alessandro Sonnenfeld (University of Tokyo) who developed this technique joined the research team…

A Dutch-Italian-German team of astronomers has observed a huge glow of radio emission around a cluster of thousands of galaxies. They combined data from thousands of LOFAR antennas that were focused for 18 nights on an area the size of four full moons. This is the first time astronomers have been able…

Leiden University, Department of Economics

In specialist organ literature a negative verdict is given on organs and organ specialists from the 1930’s. Did the same verdict apply to Johan van Meurs’ (1903-1986) work? Which role does Van Meurs’ collection of organ specifications play in the historical research on the organ?

Inaugural lecture

Foute taal? Bestaat niet!

Researchers have discovered oxygen in the furthest known galaxy JADES-GS-z14-0. Leiden astronomers Sander Schouws and Rychard Bouwens were part of the team that made this discovery. This news was reported in all newspapers and online media.

An international team of more than 200 astronomers from 18 countries has published hundreds of thousands of unknown galaxies. The data are part of a project lead by Leiden professor of Observational cosmology Huub Röttgering. Both Dutch and international media reported extensively about the publica…

Op 22 september 2021 verschijnt de volgende publicatie van dr. Charlotte J.C. Broer: "Uitzicht op Oudwijk Bisschoppen, burggraven en het circa 1135 gestichte wereldlijke vrouwenstift in Oudwijk bij Utrecht in de twaalfde en dertiende eeuw". Voor meer informatie: http://www.broerendebruijn.nl/Oud…

The position of writing within the domain of artistic academic research is not self-evident. In academia, standard practice is to use writing for the transfer of knowledge: it is a means of communication. In the practice of (nonlinguistic) artistic research, the outcome is also often contextualized…

On the 12th of December, Ria Huijgen-Koolen successfully defended a doctoral thesis. Leiden University Centre for Linguistics congratulates Ria on this achievement!

In this thesis, I studied the origin and evolution of the non-thermal radiation in merging galaxy clusters.

Promotor: Prof.dr. K.H. Kuijken, Co-Promotor: Dr. H.Hoekstra

Study information

This project sets out to map, document and analyze instances of squatting in Leiden from 1970 to 1990, in order to set up an online Digital Archive of Squatting in Leiden. This archive will function as an online resource for academic research, as well as a starting point for public activities such as…

In de maanden maart, april en mei organiseerde het programma Transparantie in Informatie, van de ministeries van Economische Zaken en Klimaat (EZK) en Landbouw, Natuur en Voedselkwaliteit (LNV), gesprekken over de veranderopgave naar een Open Departement. De sessies hadden als doel om een eerlijk en…

De vraag is hoe groot de dreiging van het rechts-extremisme is in Nederland? Nikki Sterkenburg spreekt hierover in Trouw en RTL Nieuws.

From how litter spreads to which languages are spoken in Leiden and The Hague: over 50 interesting, surprising, complex and entertaining questions were sent in for the Citizen Science Project to mark our 444th anniversary.

Tiny self-propelling spheres, measuring only micrometers, move faster over a hydrophobic silicone surface than they do over hydrophilic glass. 'Almost nobody had realised that the substrate matters', says Stefania Ketzetzi, the researcher who discovered the effect, researched it and explained it. She…

Zou je graag een hoofdstuk uit je proefschrift in informele setting willen bespreken? Heb je een onderzoeksidee dat je graag zou voorleggen aan vakgenoten? Neem dan contact op met ozsmed@hum.leidenuniv.nl. De Onderzoekschool organiseert sinds kort een seminarreeks waarin dergelijke onderwerpen in een…

Universiteit Leiden en Unicef werken al 10 jaar samen om kennis over kinderrechten uit te breiden en te verspreiden. Ze verlengen deze samenwerking.

To tackle deepfakes, Denmark proposes expanding copyright law so everyone gets copyright over their own face and voice. There are similar ideas in the Netherlands with an online consultation. In Latvian newspaper ‘Latvijas Avīze’, Dirk Visser and Bart Custers discuss the proposals.

What did medieval scholars think of the books they read? In her inaugural lecture, Professor Mariken Teeuwen will talk about the texts they wrote in the margin.

How can we slow the progression of atherosclerosis? Researcher Amanda Foks believes the answer may be switching off ageing immune cells. This could lead to an entirely new treatment for heart attacks and strokes. She has been awarded an Established Investigator Dekker Grant by the Dutch Heart Founda…

The role of transnational, non-institutional networks in the opening up of British transatlantic trade at the end of the 17th/beginning of the 18th century

In 2009-2010, the notion of a more ‘assertive’ China emerged in Western discourse, a viewpoint that China vehemently rejects. Nevertheless, especially after Xi Jinping rose to power in 2012, it is clear that China has abandoned its long-held foreign policy doctrine of ‘keeping a low profile.’

Hoe kan het dat universele mensenrechten wereldwijd niet hetzelfde in de praktijk worden gebracht?

The formal handing over of the keys for the first stage of the Science Campus will take place on 23 February.

The year is 2032 and the Arctic ice cap has melted causing new trade routes to emerge. This case is the focal point of the Young Diplomat Conference during which honours participants spend a weekend as diplomats solving disputes between countries.

Jordy Bouwman and future Sterrewachter Reinout van Weeren have been awarded a Vidi subsidy to set up or expand their own line of research.

Statements made by Caroline van der Plas about nitrogen emissions and European law are incorrect: Armin Cuvyers on Dutch radio EenVandaag programme’s item ‘fact or fiction’.

In Nieuwsuur ging Michael Klos, docent/onderzoeker bij de Universiteit Leiden, ging bij Nieuwsuur in op ‘de Twitterfiles’.

A respectable 5,023 runners took part in the Leiden Canal Run on Friday 5 April. They raised the sum of €22,302 for various Leiden charities.