When a star gets too close to a supermassive black hole, it is torn apart by strong tidal forces in a tidal disruption event (TDE).

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

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.

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

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)

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.

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.

Multiple stars, that is two or more stars composing a gravitationally bound system, are common in the universe.

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.

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

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

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

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

This thesis addresses the chemical processes that determine the compositions of giant planet atmospheres.

Understanding the formation and evolution of planetary systems is one of the most fundamental challenges in astronomy. To directly image and study young exoplanets and the circumstellar disks they form from, dedicated high-contrast imaging instruments are built.

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

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

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

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

Pulsars were first discovered in 1967 and since then the population has grown and expanded over several wavelengths.

Promotor: I. Snellen, Co-Promotor: M. Kenworthy

Electrocatalysis allows for storing electricity or converting it into chemical bonds, producing chemical building blocks and fuels using renewable resources.

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

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Sustainable energy from wind and solar is most readily available near the sea.

Tin electrodeposition applications have rapidly evolved in the past 25 years.

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This dissertation consists of two parts, with the common theme

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Promotores: S.F. Portegies Zwart, E. M. Rossi

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The high velocity tail of the total velocity distribution of stars provides essential insight into fundamental properties of the Galaxy.

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.

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).

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.

1) Assess the trends in supply and production status of these critical minerals and mineral products worldwide and Europe’s dependence including on intermediate products such as permanent magnets, RE based super alloys, batteries, polishing compounds, phosphors, catalysts etc. 2) Trace the entire value…

Wiskunde en Natuurwetenschappen, Sterrewacht Leiden (STRW)

Scherpe nieuwe opnamen laten opvallende structuren zien in de planeetvormende schijven rond jonge sterren. Daarover publiceren verschillende teams astronomen, onder wie Leidse sterrenkundigen Jos de Boer en Christian Ginski.

De onderzoeksvoorstellen van wiskundige Peter Bruin, natuurkundige Daniela Kraft, bio-farmaceut Rawi Ramautar en sterrenkundige Catherine Walsh en nog 7 onderzoeksvoorstellen van talentvolle Leidse wetenschappers zijn gehonoreerd met een Veni-subsidie van 250.000 euro. Landelijk zijn 155 Veni’s vers…