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

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

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…

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

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

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

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

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.

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.

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

Promotor: Prof.dr. A.G.G.M. Tielens, Prof.dr. C. Dominik (UvA)

Promotores: Prof.dr. C.U. Keller, Prof.dr. H.C. Gerritsen

In this thesis new methodologies are developed for the detection and systematic study of radio sources in the early universe. This allows us to gain a deeper understanding of the formation and evolution of galaxies, the activity of supermassive black holes, and the final phase transition of our universe:…

Promotor: K.H. Kuijken

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

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

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

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

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%).

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.

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…

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

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

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

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

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

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.

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

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

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.

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. H.V.J. Linnartz

Vorige week trok een meteoriet over ons land, die uiteindelijk in Duitsland neerkwam. Bij Goedemorgen Nederland vertelt hoogleraar Vincent Icke waarom een meteoriet een bijzondere verschijning is.

Understanding how chemical complexity emerges during star formation requires connecting molecular material preserved in interstellar ices with that observed in the gas phase after protostellar heating begins.

Exoplanets close in to their host star receive high levels of extreme ultraviolet (EUV) irradiation, capable of heating and ultimately driving the hydrodynamic escape of their atmospheres.