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

Promotores: Prof.dr. J. Schaye & Prof.dr. C. Steidel (California Institute of Technology)

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

This thesis investigates the structural evolution and assembly of galaxies since the first few billions years after the big bang.

This thesis is an experimental study of the UV irradiation of the interstellar ice analogues, relevant for the different stages of the star and planet formation sequence.

The formation of stars and planets happens over multiple scales, which can interact. In particular, planet formation happens in the dense, complex environment of star forming regions.

Hot rocky exoplanets are planets that orbit so close to their host star that they possess a molten surface.

Mail ons met vragen of opmerkingen op VO-S@strw.leidenuniv.nl

Promotie

Promotores: Prof.dr. A.G.G.M. Tielens, Prof.dr. L.B.F.M. Waters (UvA), Prof.dr. C. Dominik (UvA)

Promotores: Prof.dr. F.P. Israel, Prof.dr. P.P. van der Werf

This Thesis shows discoveries in non-linear astrochemical kinetics as well as a deeper analysis of dark clouds chemistry.

Water is all around us and is vital for all aspects of life. Studying the various compounds and life forms that inhabit natural waters lets us better understand the world around us.

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

The thesis explores how interstellar chemistry evolves as a function of time and changing physical architectures during the formation of stars.

Promotor: Prof.dr. M. de Jong, Co-Promotor: A.J. Heijboer

Promotie

Intelligentie was lange tijd hét kenmerk van de mensheid. Maar inmiddels beginnen computers ons naar de kroon te steken. Kunstmatige intelligentie komt in hoog tempo onze samenleving binnen, en blijkt dingen te kunnen die tot voor kort uniek menselijk leken. Maar hoe is een computer slim? En wat zegt…

Op deze pagina vind je een overzicht van prijzen en subsidies die in 2025 zijn toegekend aan onze medewerkers en studenten, en de bijzondere benoemingen aan de Universiteit Leiden en andere instellingen.

This thesis describes the implementation and on-sky demonstration of high-resolution integral-field spectroscopy for extreme adaptive optics systems that are used to find and characterize exoplanets.

This thesis is largely an experimental study on the formation of solid-state simple and complex organic molecules in the H2O-rich and CO-rich ice phases of dense interstellar clouds and dark cores.

This thesis investigates the evolution and fate of gaseous exoplanets, which are continuously shaped by stellar activity across both short and long timescales.

Over geschiedenis van de sterrenkunde van radioastronomie tot exoplaneten, de revolutionaire ontwikkeling van de naoorlogse sterrenkunde.

Forming at the nodes of the Cosmic Web and growing hierarchically via mass accretion, galaxy clusters are the largest virialized halos in our universe, composed of dark matter (DM; ≥85%), ionized hot plasma in the intracluster medium (ICM; ≥10-15%), and galaxies (≥1-5%).

In the past decade many population studies have been performed with the Atacama Large Millimeter/submillimeter Array (ALMA) to understand the bulk properties of protoplanetary disks around young stars. These population studies mostly consisted of low mass stars, with relatively few of the disks around…

The largest structures in the Universe are clusters of galaxies. Each can contain hundreds to thousands of galaxies.

The intracluster medium (ICM) is a hot, tenuous and X-ray emitting gas that pervades galaxy clusters.

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

The origin and evolution of galaxies are closely linked to many different physical phenomena.

Over the past years it has been discovered that the population of extra-solar planets is large and diverse.

Protoplanetary disks are the gas and dust environments where planetary systems form around young stars. Using observations from the Atacama Large Millimeter/submillimeter Array (ALMA) this thesis analyses the gaseous molecular reservoir, using multiple tracers to resolve the 3D structure of protoplanetary…

Promotor: Prof.dr. H.V.J. Linnartz, Co-Promotores: S. Ioppolo, H.M. Cuppen

In this thesis chemical and physical processes in the ice mantles on interstellar dust grains are studied.

Radio jets are important to the evoultion of galaxies. However, it is still not fully understood how a radio jet can be triggered.

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

Promotor: K.H. Kuijken

Promotor: Prof.dr. H.L.V. Linnartz

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

Galaxies in the Universe are distributed along the intricate framework of the Cosmic Web. Groups and clusters of galaxies comprise the densest regions in this network, and therefore, are excellent cosmic laboratories to study different aspects of galaxy evolution in extreme environments.

Promotor: Prof.dr. M. Franx, Co-Promotor: Rychard Bouwens

This thesis contributes to studying primordial cosmology theories and their detectability in future observations.

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

Promotor: Prof.dr. E.F. van Dishoeck, Co-Promotor: G.J. Herczeg

This thesis develops a method for direction dependent calibration of the ionosphere in radio interferometric data.

When a star is born in our Galaxy, it is quite likely that it has formed within a massive cluster, which hosts numerous high-mass stars bathing their lower mass neighbours in UV radiation.

Promotor: Prof. dr. A.G.G.M. Tielens

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

The Sun and all the stars in the night sky reside in the Milky Way galaxy. In the at-rest reference frame of the Galaxy, typical stars travel with velocities of about 100-200 kilometres per second.

Wat is er nodig om een mens te maken? Een uitdijend heelal. Gebouwd uit deeltjes, ruimte en tijd, en hun subtiele mechanismen.

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