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.

List of ProParte sub-associations.

The buildings will be developed one by one. The work will vary from the major redevelopment, refurbishment or renovation of existing buildings.

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

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

The ALMA Local Expertise Group (Allegro) is located in the Leiden Observatory (Sterrewacht). Professor Ewine van Dishoeck: ‘The Netherlands has played an important role in establishing ALMA. Thanks to this subsidy, we can now reap the scientific benefits.'

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…

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

Promotors: W. Jiskoot; G.J. Witkamp, Co-promotor: M.R. Nejadnik

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

Outflows are crucially important for the gas budget and evolution of luminous star-forming galaxies and AGNs, with observed mass outflow rates of the same order as the star formation rate. Greater star formation and black hole growth lead to more intense feedback and outflows, resulting in self-regulated…

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

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…

A study into the investment and impact of construction projects on Mycenaean communities in Late Bronze Age Greece

Within the Graduate School you can conduct your PhD research in a wide range of subjects across the Social and Behavioural Sciences, with five distinct research areas offered by its Institutes.

Promotor: J.N. Kok, Co-promotor: M.S. Lew

Large-scale computing infrastructure, such as supercomputers, cluster, and clouds, are already pervasive, most members of our society interact with them daily: social networks, government services, media streaming services--all systems heavily interfacing with the members of our society--are powered…

Our research at CWTS is organized in three focal areas. These focal areas represent our core areas of interest, as defined in our knowledge agenda for the period 2023-2028.

We present our plans on five work areas: Students, Inclusive Education, Staff, Research, and Accessible and Inclusive Learning and Working Environment. For each work area, we explain which topics are relevant and what policy measures we (plan to) take.

Particles are omnipresent in biopharmaceutical products. In protein-based therapeutics such particles are generally associated with impurities, either derived from the drug product itself (e.g. protein aggregates), or from extrinsic contaminations (e.g. cellulose fibers).

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.

PURPOSE: Determine the effect of minute quantities of sub-visible aggregates on the in vitro immunogenicity of clinically relevant protein therapeutics.

An in-depth history of Large Language Models—and what their ubiquity, disruption, and creativity mean from a wider sociopolitical perspective.

The GTGC programme advances interdisciplinary research on how we govern – and could govern – major world-scale changes in contemporary society. These global transformations and governance challenges cover the themes listed here. The distinctions are not rigid, of course, and affiliated researchers often…

Promotores: F.H.J. Redig, W.T.F. den Hollander

Paul Hudson, Associate Professor of Physical Geography at Leiden University College, examines human impacts on lowland rivers in his new book.

PLATO is active in various fields of work.

The Tappino Area Archaeological Project aims to map and analyze ancient settlement patterns and dynamics in a small valley in Central-Southern Italy, in modern Molise (province of Campobasso). The first sites in the area date to the Bronze Age. In the Iron Age to Classical period, it was reportedly…

Everyone wherever they are in the world can follow free online academic courses offered by Leiden University.

The Old Observatory has a rich history. On this page you will find a short version of the history that took place in the observatory.

To truly understand complex regions such as the Middle East and Asia, you have to know their culture, history and local societies inside out. Driven by curiosity for other cultures, the Leiden University Institute for Area Studies (LIAS) provides an understanding and analysis of current and historical…

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

Promotor: W.Th.F. den Hollander Co-Promotor: F.M. Spieksma

The Centre is the proud home of several research programmes.

Recent study led at the Leiden Observatory has observed Orion with unprecedented detail. New data from the Atacama Large Millimeter/submillimeter Array (ALMA) and other telescopes have been used to create this stunning image showing a web of filaments in the Orion Nebula. These features appear red-hot…

A team of European astronomers under Leiden leadership has discovered that dust particles around a star already coagulate before the star is fully grown. These agglomerated dust particles are the first step in the formation of planets. The research publish their discovery in the journal of Nature As…

ALMA has observed stars like the Sun at a very early stage in their formation and found traces of methyl isocyanate - a chemical building block of life. This is the first ever detection of this prebiotic molecule towards solar-type protostars, the sort from which our Solar System evolved. The discovery…

The Leiden Bio Science Park (LBSP) is the largest innovation district in the Netherlands in the field of Life Sciences & Health. The clustering of high-quality education, research, healthcare, and industry attracts students, scientists, and entrepreneurs from all over the world to the knowledge city…

Even though more than 4000 extra-solar planets are known today, only a small fraction of these has been captured in an image. To better understand the planet formation mechanisms in solar-like environments we started the Young Suns Exoplanet Survey (YSES).

In this thesis, I study the formation of large-scale structure and the physics of particle acceleration at large scales (~Mpc).