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?

The largest fertility clinic in the Netherlands lied to women, sperm donors, and the Health and Youth Care Inspectorate. On ‘Nieuwsuur’, Mirjam Sombroek van Doorm, Professor of Law and Health, foresees legal consequences: 'The situation is too serious.'

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.

Foute taal? Bestaat niet!

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…

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.

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…

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.

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’.

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.

In 2009, the European Union adopted the Renewable Energy Directive (RED), mandating Member States to obtain 10% of all transport fuels from renewable sources by 2020.

Dutch Mayor Eddy Bilder has once again come under scrutiny over his ancillary positions. He was previously the subject of negative media attention due to his role as landlord and now as a regulator of the foundation Stichting Het Oversticht. Geerten Boogaard, Professor of Local Government, discussed…

The strong support for the petition highlights that this issue is far more relevant and urgent to scientists and professionals than commonly believed.

On Good Friday (30 March) and Easter Sunday and Monday (1 and 2 April) most Leiden University premises are closed. Both the University Library and Wijnhaven Library will be open on Good Friday and on Saturday 31 March.

Op papier in acht dagen duidelijkheid over asiel, maar in de praktijk duurt de IND-procedure gemiddeld 67 weken. De IND wil de procedure versnellen, mede door nieuwe Europese regels die in juni in werking treden. Mark Klaassen, universitair docent migratierecht duidt de zaak in een uitzending van Ni…

Fourteen women professors are to be given a place in the classic portrait gallery in Leiden University’s Senate Chamber. The portraits will be unveiled on 8 March – International Women’s Day – by former Minister of Education, Culture and Science Jet Bussemaker and Rector Magnificus Carel Stolker.

There is a growing conflict between the US and the EU about the investigation by the Commission under the EU State aid rules into so called