Promotores: Prof.dr. M. Franx, Prof.dr. M. Kriek (Univ. of California at Berkeley)

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

Franx

Promotores: S.F. Portegies Zwart, E. M. Rossi

Promotor: K.H. Kuijken

This thesis aims to enhance our understanding of galaxies by testing theoretical models of galaxy formation against observations, particularly in the cases of extreme systems which have been found to have an excess of baryonic mass in their central regions, in the form of either supermassive black holes…

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

Promotor: Prof.dr. E. F. van Dishoeck, Co-promotor: A. N. Heays

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.

In 2018, the European Year of Cultural Heritage, Leiden University Libraries focuses on the materiality of text and image with its activity programme titled ‘Beyond Content’. The programme pays attention to the forms in which historical texts and images have come down to us, and also to the new technologies…

Rossi

This dissertation reports on the pedagogical content knowledge (PCK) of science teachers during a professional development program. This research intended to help us understand why and how teachers make their classroom decisions as they teach science.

In the Netherlands approximately 130 out of 700 secondary schools offer a bilingual stream. However, research about CLIL (Content and Language Integrated Learning) is limited. With her dissertation Evelyn van Kampen (PhD student at ICLON) wants to contribute to the understanding of the nature and range…

Recent study led at the Leiden Observatory has observed Orion with unprecedented detail. New data from the Atacama Large Millimeter/submillimeter Array (ALMA) and other telescopes have been used to create this stunning image showing a web of filaments in the Orion Nebula. These features appear red-hot…

Promotor: B. van de Water, Co-Promotores: J.H.N. Meerman, F.J. Verbeek

Joseph Callingham from the Leiden Observatory receives the Louise Webster Prize for outstanding post-doctoral research. The prize is awarded by the Astronomical Society of Australia for Callingham’s search for the most extreme object in the Universe.

Promotores: Prof.dr. A.G.G.M. Tielens & Prof.dr. L. Kaper (UvA)

Circumstellar discs are the reservoirs of gas and dust that surround young stars and have the potential to become planetary systems.

When observing star-forming galaxies, we are not only seeing stellar light, but we also see how this interacts with galactic gas and dust. This thesis contains studies of the stellar, nebular and dust properties of low mass star-forming galaxies.

PhD Defence

OB associations are loose groups of young, massive stars. They constitute the last stage of the massive starformation process, and the context in which new stars are formed.

Promotor: Prof.dr. S.F. Portegies Zwart, Co-promotor: D.C. Heggie

Promotor: F.P. Israel, Co-Promoter: R. Meijerink

Stellar feedback is a crucial ingredient in the evolution of galaxies.

Researchers at Leiden Observatory study the fundamental physics that creates structure in the Universe. These processes collect matter into galaxies and gas into stars. With the use of powerful telescopes and advanced calculations and computer simulations, Leiden astronomers seek to understand the origin,…

Researchers at Leiden Observatory study the fundamental physics that creates structure in the Universe. These processes collect matter into galaxies and gas into stars. With the use of powerful telescopes and advanced calculations and computer simulations, Leiden astronomers seek to understand the origin,…

Promotor: P. T. de Zeeuw, Co-promotor: N. Neumayer; G. van de Ven

The high velocity tail of the total velocity distribution of stars provides essential insight into fundamental properties of the Galaxy.

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).

This thesis investigates how galaxies form and what diversifies the evolutionary histories of galaxies.

Promotor: Prof.dr. S.F. Portegies Zwart

Conference

PhD Defence

Online content can be harmful to democracy and the self-regulation approach is no longer adequate, claims Professor Tineke Cleiren in an opinion piece in Dutch newspaper de Volkskrant.

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

Last Friday was Master’s Open Day time once again. Students from home and abroad descended on Leiden and The Hague to find out more about our master’s programmes. Alongside the presentations, the information fairs gave them a good opportunity to ask any questions.

Searching for ways to delay the need for a transplant and trying to build kidneys to order.

How do teachers conceptualise, develop and implement an effective CLIL practice?

At Leiden Observatory, researchers investigate the origin of stars and their planetary systems. They detect and characterize planets around other stars, which are called exo-planets. They study how stars and planets form. And they follow molecules from interstellar clouds to nascent planet systems.…

Promotores: Prof.dr. M. Franx & Prof.dr. P.G. van Dokkum (Yale University)

Promotor: B. van de Water

Chemical-induced organ toxicity is a major concern in the development and use of chemicals, including drugs, pesticides, industrial chemicals and cosmetics. In the last decades, the onset and progression of chemical-induced organ toxicity has been linked amongst others to perturbation of mitochondri…

To study how planetary systems come into existence we study much younger systems still in formation.

Supervisor: S.F. Portegies Zwart Co-Supervisor: A.G.A. Brown

Promotor: Jelle S. Kaastra Co-promotor: Jelle de Plaa

A remarkable population of short period transiting rocky exoplanets with equilibrium temperatures on the order of 2,000 K has recently been discovered.

Promotor: Prof.dr. V. Icke, Co-Promotor: T.I. Madura