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

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

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.

Organic molecules in interstellar space are important as they influence the structure of galaxies and star formations. Studying catalytic processes in space allows us to understand how molecular species are formed and chemically evolved in the interstellar medium and solar system objects.

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

In this thesis, we present new laboratory data of interstellar dust analogues.

Promotor: H.V.J. Linnartz

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

Prof. A.G.G.M. (Xander) Tielens wordt bij 1 januari bij de Faculteit der Wiskunde en Natuurwetenschappen benoemd tot hoogleraar ‘Physics and Chemistry of the Interstellar Medium’. Tielens werkt momenteel als senior onderzoeker bij Ames in Moffett Field, Californië. Ames is een onderdeel van NASA. Daarnaast…

Laboratory, observation and modeling work on the dissociation of polycyclic aromatic hydrocarbons in interstellar environments and the formation of new molecular species through the fragmentation process.

Galaxies are environments where gas coalesces, cools, and is converted into stars. However, it remains unclear the exact mechanisms through which galaxies acquire, redistribute and lose their gas.

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.

Promotor: Prof.dr. H. J. A. Röttgering, Co-Promotor: M. Haverkorn

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

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

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

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

The formation and evolution of galaxies is fundamentally driven by the formation of new stars out of cold gas.

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

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

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

This thesis is about the study of hydrocarbons via infrared spectroscopy.

Ineke Smit verdedigde haar proefschrift op 17 september 2019

Stofdeeltjes in de ruimte vormen de basis voor nieuwe sterren en planeten. Maar waar bestaan die stofdeeltjes uit, en hoe gedragen ze zich? Sascha Zeegers onderzocht het. Promotie op 1 november.

A revolutionary supercomputer with energy-efficient parts that are available in the shops. Professor of Computational Astrophysics Simon Portegies Zwart has been awarded an NWO Medium Grant to build this processing giant, which will have the power of a supercomputer but requires only one percent of…

Astronomen van de Universiteit Leiden hebben in data van het SOFIA observatorium ontdekt dat de sterrenwind van een pasgeboren ster in de Orionnevel verhindert dat er in de directe omgeving meer sterren worden gevormd. Dat maakte coauteur Xander Tielens bekend tijdens een persconferentie op de 233ste…

This thesis revolves around the electronic spectroscopy of molecules in the laboratory and the search for the carriers of the diffuse interstellar bands (DIBs).

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

NWO heeft vier TOP subsidies toegekend voor Leidse astronomen en één voor een Leidse wiskundige, landelijk zijn er 19 subsidies toekend aan exacte wetenschappers. De onderzoeken van prof. Xander Tielens met prof. Huub Rottgering, dr. Michiel Hogerheijde en dr. Jelle Kaastra zijn gehonoreerd met een…

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

It has now been well established that shocks and turbulent motions in the intra-cluster medium (ICM) generated through cluster mergers can produce large-scale synchrotron emission.

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

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.

Promotie

Promotie

I have studied the hot, diffuse gas around and between galaxies. Specifically, I have used the EAGLE numerical simulations of galaxy formation to predict the properties of this gas, and I have used those properties to predict specific observables: soft X-ray absorption and emission lines.

Lezing

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Promotie

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

It is an established fact that the Standard Model has to be extended to explain the so-called Beyond the Standard Model (BSM) phenomena: dark matter, matter-antimatter asymmetry of the Universe and neutrino flavour oscillations.

Promotie

In order to gain a better insight into the basis of the rapid jasmonic acid (JA)-mediated stress response, an integrated approach using a targeted high-resolution mass spectrometry-based (HRMS) platform, was conducted to monitor the metabolism of JA using the model system of cell suspension cultures…

Promotor: Prof.dr. M. de Jong

Promotor: Prof.dr. E. F. van Dishoeck

Promotor: H.J.A. Röttgering, Co-promotor: M. Haverkorn

Lezing

From the 1920s on, popular music in Southeast Asia was a mass-audience phenomenon that drew new connections between indigenous musical styles and contemporary genres from elsewhere to create new, hybrid forms. This book presents a cultural history of modern Southeast Asia from the vantage point of popular…

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