This thesis focuses on protoplanetary disks: flattened structures of gas and dust around young stars in which planets are expected to form and grow.

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

My work focuses on a class of astronomical objects called protoplanetary disks.

The work presented in this thesis is based on ALMA surveys of protoplanetary disks in three star-forming regions: Lupus, OMC-2, and NGC 2024.

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

This research focuses on the distribution of chemical elements in protoplanetary disks, the birthplaces of planets. These disks form around young stars and contain gas and dust, from which planets grow. Ice plays a crucial role in planet formation, aiding the clumping of dust particles and influencing…

This thesis examines the link between simple molecules and the underlying structure and chemistry within protoplanetary disks - the birthplaces of planets.

A large diversity of exoplanetary systems has been found, but it is still unclear what drives this diversity.

Promotor: Prof.dr. C.U. Keller

The last decades it is increasingly recognized that acute as well as chronic postoperative pain is an important problem. Treatment and prevention of postoperative pain is a challenge, especially in special patient populations where there is only limited guidance on how to optimally use opioids.

Promotie

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: E. F. van Dishoeck, Co-promotor: C. Walsh

Planets are formed in disks of gas and dust around young stars.

Jaroslaw Kantorowicz onderzoekt hoe strategische klimaatprocessen de publieke houding ten aanzien van klimaatbeleid beïnvloeden.

Detecting planets during their formation stages is crucial for understanding the history and diversity of fully developed planetary systems like our own. However, observing young planets directly is challenging because they are often deeply embedded within their host protoplanetary discs, rich in gas…

To address the fundamental questions of how life on Earth emerged and how common life may be in the Universe, it is crucial to know the chemical composition of the planet-forming material.

Promotores: Prof.dr. E.F. van Dishoeck, Prof.dr. C.P. Dullemond

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.

This thesis discusses the physical and chemical processes than influence the composition of forming planets.

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…

In de nieuwe hulprubriek 'Dr. Does ziet licht' behandelt hoogleraar klinische psychologie Willem van der Does maandelijks grote en kleine levensvragen die lezers van het blad Zin hebben gemaild.

Ambtenarensystemen zijn wereldwijd krijgen wereldwijd veel kritiek. Dit artikel presenteert een onderzoek naar bewijsmateriaal over over overheidsprestaties en merictocratie.

This thesis takes steps toward understanding the interaction between gas-phase and solid-state molecules in star- and planet-forming regions.

This thesis focusses on the temperature structure in protoplanetary disks. The relation between structures seen in the dust and gas-phase molecules is investigated.

The focus of this thesis is how stars like our Sun and planets like Jupiter, Saturn, and Earth are formed.

We have conducted a full spectral line survey of the 3-13 micron region of two massive protostars, AFGL 2591 and AFGL 2136, for the first time at high spectral resolution.

In dit artikel onderzoeken Kohei Suzuki en zijn medeauteurs de relatie tussen baanzekerheid, tijdelijk werk en de resultaten van werknemers in de publieke sector in een tijd van toenemende hervormingen en politisering.

This thesis is a (biased) journey through very different topics in astrophysics: quasars and new populations of active galactic nuclei, gravitational waves from merging black holes, and protoplanetary discs around young stars.

Als het gaat om de naleving van de coronaregels verschillen we nogal van mening. Maar waarom eigenlijk? Volgens Willem van der Does is er sprake van rouwverwerking en bevindt niet iedereen zich in hetzelfde stadium. Lees meer op de populair-wetenschappelijke nieuwssite Scientias.nl.

High-angular-resolution observations of the circumstellar material have uncovered numerous and very diverse substructures in protoplanetary discs, raising the question of whether they are caused by forming planets or other mechanisms.

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

In dit artikel onderzoekt Rutger Leukfeldt, bijzonder hoogleraar Governing Cybercrime, met collega's de relatie tussen PMT-factoren en zelfbeschermend onlinegedrag.

De schedel doorboren met een ijspriem, onverdoofd shocks toedienen of bloedzuigers in de baarmoeder aanbrengen: geen middeleeuwse martelmethoden, maar therapieën uit de geneeskunde. Willem van der Does schreef er een boek over. ‘Artsen voerden zo'n behandeling met de beste bedoelingen uit.’

How do local, non-institutional ideas about end-of-life care influence professional palliative care and vice versa? These questions will be answered by medical anthropologists Annemarie Samuels and Natashe Lemos Dekker in the coming years.

Een team wetenschappers, waaronder de Leidse Astronoom Alice Booth, heeft siliciummonosulfide-moleculen ontdekt in de stofschijf rondom een jonge ster. Die moleculen duiden op planeetvorming. Het team deed de ontdekking met behulp van de ALMA-telescopen. Deze methode vormt een alternatief voor wanneer…

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.

Hoe vergroot je de kans om gedrag aan of af te leren? Wat kan helpen is kennis van een overzichtelijk aantal principes van gedragsverandering. Die principes worden uitgelegd en toegepast door Willem van der Does, hoogleraar Klinische Psychologie. Eerder verschenen van zijn hand o.a. Zo ben ik nu eenmaal!…

Willem van der Does vertelt in zijn boek De magie van heling over veertien pioniers uit de geschiedenis van psychiatrie. Deze pioniers hadden allemaal een ding gemeen: ze begonnen met een radicaal idee wat leidde tot groot enthousiasme

Promotor: Prof.dr. E.F. van Dishoeck, Co-Promotor: M.R. Hogerheijde

This thesis describes the development and validation of new high-contrast imaging techniques, with the ultimate goal of enabling the next generation of instruments for ELT-class telescopes to directly image Earth-like extra-solar planets orbiting around nearby stars.

Promotie

Promotor: J. Schaye

Transcutaneous vagus nerve stimulation (tVNS) was tested in chronic worriers. tVNS may reduce spontaneously occurring negative thought intrusions. After a worry induction, there was no longer an effect of tVNS. tVNS did not affect physiological responding to worrying.

There is no human society that does not employ a rich and diverse language. This course introduces you to linguistics, featuring interviews with well-known linguists and with speakers of many different languages. Join us to explore the miracles of human language!

Promotie

CMLCA is a software tool that supports the technical steps of the Life Cycle Assessment. The focus of the program is on advanced computational aspects of life cycle inventory calculations.