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

The Sun and all the stars in the night sky reside in the Milky Way galaxy. In the at-rest reference frame of the Galaxy, typical stars travel with velocities of about 100-200 kilometres per second.

Why do black holes emit thermal radiation? And how does a closed quantum system thermalize?

The thesis deals with the study of giant radio galaxies (GRGs), which are radio galaxies of megaparsec sizes.

Twee podcastafleveringen van Africast over de Transatlantische Slavenhandel met Karwan Fatah-Black.

In this thesis, we use low-frequency and high-frequency radio observations to address the following questions regarding quasars: is the radio loud/quiet quasar dichotomy real?

An Active Galactic Nucleus (AGN) is a highly luminous region at the center of a galaxy, powered by the accretion into a supermassive black hole and emitting energy from radio waves to gamma rays, often outshining the host galaxy.

The physical origin of the dozens of stellar-mass binaries, the mergers of which have been detected by the LIGO-Virgo-KAGRA collaboration via gravitational waves, is still unknown.

Optimization tasks in practice have multifaceted challenges as they are often black box, subject to multiple equality and inequality constraints and expensive to evaluate.

This thesis aims to enhance our understanding of galaxies by testing theoretical models of galaxy formation against observations, particularly in the cases of extreme systems which have been found to have an excess of baryonic mass in their central regions, in the form of either supermassive black holes…

Lezing, Studium Generale

Continuous optimization is never easy: the exact solution is always a luxury demand and the theory of it is not always analytical and elegant.

Promotor: H.J.A. Rottgering, Co-Promotor: R.J. van Weeren

In samenwerking met Rijksmuseum Boerhaave, naar aanleiding van de tijdelijke tentoonstelling 'Dichter bij het zwarte gat', te zien t/m 5 januari 2025.

Uncertainty and noise are frequently-encountered obstacles in real-world applications of numerical optimization. The practice of optimization that deals with uncertainties and noise is commonly referred to as robust optimization.

The increasing competition in the automotive industry requires the tailored, swift development of technologically sophisticated vehicles. Therefore, the computationally expensive state-of-the-art simulation technologies are combined with optimization algorithms. An example of a real-world optimization…

Black Theatre, activistisch theater van en voor zwarte Zuid-Afrikanen, bloeide op onder de apartheid. Maar met de democratisering van Zuid-Afrika heeft deze kunstvorm allerminst aan belang ingeboet, meent Francis Rangoajane. Promotie op 16 november.

Dr. Karwan Fatah-Black heeft een Veni binnengehaald voor zijn onderzoek 'Paths through slavery: urban slave agency and empowerment in Suriname, 1700-1863'.

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).

In this thesis new methodologies are developed for the detection and systematic study of radio sources in the early universe. This allows us to gain a deeper understanding of the formation and evolution of galaxies, the activity of supermassive black holes, and the final phase transition of our universe:…

Te midden van de ophef rondom het Nederlandse koloniale verleden, klonken er stemmen vanuit de gemeente Urk straten in een nieuwbouwwijk te vernoemen naar zeehelden van vroeger.

What physics controls the properties of quantum matter, such as how electrons flow inside high-temperature superconductors? This question has captivated the physics community and industry for decades, in part due to the great technological potential such materials have, but also because they have resisted…

De directe aanleiding was de dood van George Floyd door politiegeweld, maar de Black Lives Matter-betogingen in de Verenigde Staten en hier in Nederland gaan over veel meer dan dat. We vroegen Karwan Fatah-Black, historicus op het gebied van de Nederlandse slavernijgeschiedenis, naar zijn analyse. ‘We…

Promotor: W. Jaffe, Co-promotor: K. Meisenheimer

The radio sky harbours both galactic and extragalactic sources of arcminute- to degree-scale emission of various physical origins. To discover extragalactic diffuse emission in the Cosmic Web beyond galaxy clusters, one must image low–surface brightness structures amidst a sea of brighter compact fore-…

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.

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

Karwan Fatah-Black, universitair docent en specialist in Nederlandse koloniale geschiedenis, was te gast bij NPO Radio 1 en gaf een interview in het Parool. Hij sprak over zijn nieuwe boek, Eigendomsstrijd, waarmee hij een nieuw licht op ons slavernijverleden in Suriname hoopt te werpen.

Niet alleen pesticiden die boeren gebruiken, maar ook schoonmaakmiddelen en muggenspray hebben een groot effect op leven in het water. Dat vertelt hoogleraar Martina Vijver in Trouw. Als schadelijke stoffen in het water komen, kunnen organismen sterven. Daardoor verandert de samenstelling van het leven…

The thesis addresses the long-term dynamical evolution of hierarchical multiple systems.

Gruwelen van de overtocht, publieke veiling, brandmerken en dan werken op plantages in de koloniale wereld. Over het Nederlandse slavernijverleden bestaan honderden kilometers archief, maar zelden komen daarin de mannen, vrouwen en kinderen die gedwongen in slavernij leefden aan het woord.

Het begon met betogingen vanwege de dood van George Floyd door politiegeweld in Minneapolis, maar de Black Lives Matter-protesten verspreiden zich snel over heel Amerika. Dagelijks gaan door heel het land duizenden mensen de straat op. We vroegen Amerika-deskundige Sara Polak hoe dat komt. ‘Na Ferguson…

Promotor: Prof.dr. S.F. Portegies Zwart

This thesis presents pioneering work on the panchromatic emission of some of the most luminous galaxies in the early Universe: star forming galaxies and active galactic nuclei.

For optimization problems, it is often unclear how to choose the most appropriate optimization algorithm. As such, rigorous benchmarking practices are critical to ensure we can gain as much insight into the strengths and weaknesses of these types of algorithms.

Over het Nederlandse slavernijverleden bestaan honderden kilometers archief, maar zelden komen daarin de mannen, vrouwen en kinderen die gedwongen in slavernij leefden aan het woord.

Slavernij en beschaving van Karwan Fatah-Black, auteur van Eigendomsstrijd, is een kleine geschiedenis van een paradox.

The origin and evolution of galaxies are closely linked to many different physical phenomena.

Eigendomsstrijd van historicus Karwan Fatah-Black is een helder en toegankelijk boek dat nieuwe inzichten biedt in het debat over het Nederlands slavernijverleden. Het beschrijft de geschiedenis van slavernij en emancipatie in Suriname.

Nationaal parochialisme is de neiging om meer samen te werken met leden van de ingroup dan met leden van de outgroup. Angelo Romano, Matthias Sutter, James Liu, Toshio Yamagishi en Daniel Balliet bestudeerden nationaal parochialisme in verschillende landen en concludeerden in hun publicatie in Nature…

Subproject of the ERC project 'Challenging the Liberal World Order from Within: The Invisible History of the United Nations and the Global South'.

This thesis explores the theoretical and observational properties of distant massive galaxies that harbour active black holes in their centres and shine brightly at radio wavelengths.

Freshwater and brackish water ecosystems are arguably the most vulnerable ecosystems on earth, due to concentrated human developments in and around them. The Pontocaspian (PC) region located at the border of Europe and Asia contains a variety of brackish water ecosystems and unique inhabitants, known…

This research delves into a region of space known as the interstellar medium (ISM), which is essentially the area between the stars filled with gas and dust.