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

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

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.

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

Diverse types of exoplanets such as gas giants on close-in orbits (hot Jupiters) and young massive giants on wide orbits (super Jupiters), with no analogs in the Solar System, pose challenges but also opportunities to our understanding of planet formation and evolution.

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

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

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

Low-mass main-sequence stars like our Sun are continuous sources of outflowing hot magnetised plasma. In the case of the Sun, this is known as the solar wind, whereas for other stars they are called stellar winds.

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

Promotor: Arjen Doelman, Co-promotor: Vivi Rottschäfer

Promotor: M. Franx, Co-Promotor: I.F. Labbé

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

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

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

Stars like the sun are born in large molecular clouds existing from gas and dust. During the formation process, the chemical composition of the material can be altered drastically by the changing physical conditions.

Understanding how galaxies form, interact, and evolve comes largely from comparing theory predictions with observational data. Numerical simulations of galaxies provide the most accurate approach to testing the theory, as they follow the non-linear evolution of gas and dark matter in great detail and…

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.

Following the Big Bang, structure in the Universe started collapsing under the force of gravity. This resulted in the formation of the first stars, galaxies and clusters of galaxies.

Promotor: Prof.dr. J. Schaye, Co-promotor: Marcello Cacciato

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

Galaxies in the local Universe fall into two main categories of spirals and ellipticals. In this Thesis, we explore the structural evolution of galaxies into this bimodal distribution.

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

This thesis focus on the interaction between M dwarf stellar winds and Galactic cosmic rays and the possible effects on the habitability of exoplanets.

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

Hoe kunnen praktijk en theorie elkaar versterken in de neurowetenschappen? Hoogleraar Birte Forstmann spreekt in haar oratie op 2 oktober over het bouwen van interdisciplinaire bruggen tussen cognitieve neurowetenschap en cognitieve modellen. Haar aanpak kan bijdragen aan hersenonderzoek met minder…

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

Promotor: Prof.dr. C.U. Keller

Studievoorlichting

Studievoorlichting

Studievoorlichting

Hersenstimulatie en voedingssupplementen zoals tyrosine of tryptofaan lijken veelbelovende opties om de cognitieve prestaties te verbeteren. Dat constateert psycholoog Laura Steenbergen. Maar ze stelt ook dat er meer onderzoek nodig is. Promotie op 16 juni.

Beneficial plant-associated microbiota, particularly those inhabiting the rhizosphere, contribute substantially to plant health through pathogen suppression, stimulation of plant defence responses, and enhanced nutrient acquisition.

Hoe kunnen mensen hun prestaties verbeteren en hun creatieve potentieel benutten? Dat is het onderwerp van het nieuwe Journal of Cognitive Enhancement. Dit interdisciplinaire wetenschappelijke tijdschrift is een initiatief van de Leidse psycholoog Lorenza Colzato. Eerste publicatie maart 2017.

The aim of this workshop is to open up the discussion of textual communities in Late Antiquity and the early Middle Ages, by offering a platform for PhD students from all over the world and from various disciplines to present their own research and discuss it with others. Deadline: April 23.

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

De sectie Cognitieve Psychologie draagt bij aan de 3-jarige bacheloropleiding en verzorgt 2 masterspecialisaties.

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

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.

Studievoorlichting

Studievoorlichting

In astronomy, the interpration of observations and measurements plays a crucial role: we rely purely and fundamentally on the information that reaches us as observers. And 80% of all matter in the universe is undetectable directly.

One of the effects of climate change is the phenomenon of desertification, a process that occurs in semi-arid and arid areas and causes land degradation as well as vegetation loss. Due to the lack of resources, vegetation self-organizes to sustain itself by forming large-scale spatial patterns.

Pseudomonas Aeruginosa is a Gram-negative bacterium which can form biofilms, increasing its resistance against antibiotics and the host immune system. Polysaccharides are an integral part of this biofilm, one of these polysaccharides is called Psl. PslG is a glycosidase, able to cleave this polysaccharide,…

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.

Sterrenkundigen onder leiding van John Tobin hebben dankzij nieuwe waarnemingen, verricht met de Amerikaanse Very Large Array-radiotelescoop (VLA), meer inzicht verkregen in het geboorteproces van meervoudige sterren.

Een lijst met wetenschappelijke publicaties samengesteld door het team van het TRIXY Expertisecentrum.

In de nieuwe videoreeks ‘De wereld van taalwetenschap’ vertellen alumni en wetenschappers over hun passie voor hun vakgebied. Student Aline-Priscillia is vooral benieuwd hoe taal wordt verwerkt in de hersenen.