341 zoekresultaten voor “gravitational leading” in de Publieke website
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Gravitational waves through the cosmic web
The first direct detection of gravitational waves opened the possibility of mapping the Universe via this new and independent messenger.
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Cosmic tomography with weak gravitational lensing
We explored the Universe using weak gravitational lensing, a phenomenon that occurs when light from distant galaxies is bent by the gravitational fields of closer cosmic objects, much like how a lens distorts light.
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Weighing the Dark: Cosmological Applications of Gravitational Lensing
Promotor: K. Kuijken, Co-Promotor: H. Hoekstra
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Studying dark matter using weak gravitational lensing : from galaxies to the cosmic web
Of all the mass in our Universe, 80% is thought to consist of a hypothetical and invisible substance called dark matter (DM).
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Light Weighed: On the Statistics and Systematics of Weak Gravitational Lensing
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.
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Into the Darkness: Forging a Stable Path Through the Gravitational Landscape
In this thesis we study the landscape of gravitational models which modify GR by introducing an additional scalar degree of freedom (d.o.f.) to source Cosmic Acceleration.
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European Lead Factory
Overkleeft
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The lead zeppelin: a force sensor without a handle
Promotor: T. H. Oosterkamp
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The alignment of galaxies across all scales
Galaxy intrinsic alignments induce a major astrophysical contamination to weak gravitational lensing measurements and need to be modelled and mitigated when extracting cosmological information from such measurements.
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Risks to Health and the Environment Related to the Use of Lead in Products
The aim of this project was to estimate emissions from lead products-in-use for the past, the present and the future and assess the development of toxicological risks associated with these products.
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Exploring the Edge
At the largest scales, two ingredients dictate the distribution of matter in the Universe. The first is dark matter, acting as an invisible scaffolding held together by gravitational forces.
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Galaxy alignments from multiple angles
Galaxies form and live inside dark matter haloes. As a consequence, they are exposed to the tidal fields generated by the surrounding matter distribution: this imprints a preferential direction to the galaxy shapes, which leads to a coherent alignment on physically close galaxies, called intrinsic a…
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Scleral pigmentation leads to conspicuous, not cryptic, eye morphology in chimpanzees
Nieuw onderzoek van de National University of Singapore en Leiden laat zien dat chimpansees en bonobo’s net zoveel contrast in hun ogen hebben als mensen, waardoor ze gemakkelijk de richting van iemands blik kunnen volgen.
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Exploring future multi-messenger Galactic astronomy
For centuries astronomers studied the Universe by collecting light. Nowadays, we are living in times of great technological advancements, which allow us to explore our Universe in a new way - though gravitational wave radiation.
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Playing dice with the Universe
The ultimate goal of cosmologists is to find a cosmological model able to explain the current observational data.
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The connection between mass and light in galaxy clusters
Promotor: Koen Kuijken Co-promotor: Henk Hoekstra
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The galaxy–dark matter connection: a KiDS study
In this thesis, the research focuses on the properties of dark matter and dark matter haloes and how they connect with the galaxies we can observe in the Universe.
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Aggravating matters: accounting for baryons in cosmological analyses
Three major cosmology-focused missions are planned for the next decade: the Euclid space telescope, the Vera C. Rubin Observatory in Chile, and the Nancy Grace Roman Space Telescope.
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Inschrijving voor LEaDing Fellows Postdocs programma geopend
Negentig jonge, pas gepromoveerde wetenschappers kunnen vanaf 1 februari reageren op een postdoc-positie binnen het LEaDing Fellows Postdocs Programma.
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Probing the darkness: the link between baryons and dark matter
Promotor: Prof.dr. J. Schaye, Co-promotor: Marcello Cacciato
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Some Assembly Required: The Structural Evolution and Mass Assembly of Galaxies at z
This thesis investigates the structural evolution and assembly of galaxies since the first few billions years after the big bang.
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Unveiling dark structures with accurate weak lensing
Improvements of weak gravitational lensing shape measurements are presented and some used for data analysis.
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Simon Portegies Zwart in de Volkskrant over nieuw Jupitermaantje
Valetudo, zo hebben de astronomen het nieuw ontdekte Jupitermaantje genoemd. Het is een weerbarstig exemplaar dat dwars tegen haar soortgenoten in beweegt. In de Volkskrant reageert Leidse astronoom Simon Portegies Zwart op de bijzondere ontdekking.
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Prof. Vriesendorp en prof. Wessels opgenomen in de 2020 Lawdragon Leading Global Restructuring & Insolvency Lijsten
Prof. Vriesendorp en prof. Wessels zijn opgenomen in de 2020 Lawdragon 500 Leading Global Restructuring & Insolvency Lawyers. Prof. Haentjens is genoemd in de 2020 Lawdragon Leading Global Restructuring Advisors & Consultants.
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Prof. Jan Slikkerveer pleit in Indonesië voor wereldwijde lokale ontwikkeling
De president van Indonesië, Susilo Bambang Yudhoyono heeft Jan Slikkerveer, hoogleraar Etnobotanische Kennissytemen in Ontwikkelingslanden, persoonlijk uitgenodigd om een lezing te houden op het World Culture Forum. Dat wordt van 24 tot 27 november in Indonesië gehouden.
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Applications of AdS/CFT to strongly correlated matter: from numerics to experiments
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…
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Enlightening the Primordial Dark Ages
This thesis is dedicated to the exploration of the primordial dark ages: unknown physics during the earliest stages of the Universe’s expansion that have not yet been directly probed by observations. Cosmic inflation is a burst of exponential expansion of space after the “Big Bang”.
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Project Team
Dit team zorgt ervoor dat alle Una Europa activiteiten soepel verlopen en biedt ondersteuning aan Leidse collega's die direct betrokken zijn bij Una Europa activiteiten.
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Aspects of cosmic acceleration
The focus of the dissertation
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Giant galactic outflows and shocks in the Cosmic Web
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-…
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Magnetic Resonance Force Microscopy and the Spin Bath
There are many interpretations of quantum mechanics, and ultimately experiments are needed to verify or falsify these interpretations.
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From supernovae to galaxy clusters: observing the chemical enrichment in the hot intra-cluster medium
Promotor: Jelle S. Kaastra Co-promotor: Jelle de Plaa
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Hunting for the fastest stars in the Milky Way
The high velocity tail of the total velocity distribution of stars provides essential insight into fundamental properties of the Galaxy.
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Hemellichamen wegen met afbuigend licht
De meeste materie in het heelal is onzichtbaar, vermoeden veel astronomen. Maar hoe weeg je donkere materie die je niet kunt zien? Hoogleraar Henk Hoekstra zoekt naar een oplossing. Oratie op 25 juni.
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PI3K signaling and adherens junctions in invasive lobular breast cancer
Invasive lobular carcinoma (ILC) is the second most common type of breast cancer.
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Cholesterol metabolism and hematopoiesis interaction in atherothrombosis
Cardiovascular disease is the leading cause of death worldwide.
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Periodic pulse solutions to slowly nonlinear reaction-diffusion systems
Promotor: A. Doelman, Co-promotor: J.D.M. Rademacher
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Synthesis of Ribitol Phosphate based Wall Teichoic acids
Antibiotic resistance, caused by widespread use of antibiotics, leads to bacterial infections that are difficult, if not impossible, to treat and is a major worldwide health concern.
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Geometric phases in soft materials
Geometric phases lead to a nontrivial interference result when an electron's different quantum mechanical paths choices encircle a magnetic coil in an Aharonov-Bohm experiment.
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Simon Portegies Zwart
Wiskunde en Natuurwetenschappen
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'Q-wires': Synthesis, electrochemical properties and their application in electro-enzymology
An objective of this research was to achieve direct, well-defined and non-rate-limiting electron transfer between respiratory enzymes and the electrode surface by means of 'Q-wires'.
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The synthesis of chemical tools for studying sphingolipid metabolism
Sphingolipids are important membrane compounds with a variety of functions. In mammalian cells, different enzymes are involved in the metabolism of sphingolipids, but interruption of this metabolism process leads to different diseases.
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Non-linear astrochemical kinetics: theory and applications
This Thesis shows discoveries in non-linear astrochemical kinetics as well as a deeper analysis of dark clouds chemistry.
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Dynamics of TNFalpha signaling and drug-related toxicity
In previous studies at our laboratory it was demonstrated that drug exposure of HepG2 cells can lead to an altered TNFα-induced NF-κB oscillatory phenotype, concurrent with a synergistically increased sensitivity for TNFα-induced apoptosis.
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Impact assessment modelling of matter-less stressors in the context of Life Cycle Assessment
Promotoren: Prof.dr. G.R. de Snoo en Dr. R. Heijungs
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Individualized dosing of serotherapy in allogeneic hematopoietic cell transplantation - a delicate balance
Promotor: C.A.J. Knibbe, Co-promotor: J.J. Boelens, R.G.M. Bredius
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The ecological relevance of chemical diversity in plants
Promotor: P.G.L. Klinkhamer, Co-Promotores: K. Vrieling, P.P.J. Mulder
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The mechanical genome : inquiries into the mechanical function of genetic information
The four possible segments A, T, C and G that link together to form DNA molecules, and with their ordering encode genetic information, are not only different in name, but also in their physical and chemical properties.
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Towards Optical Detection of a Single Electron
Single-molecule spectroscopy has become a powerful method for using organic fluorescent molecules in numerous applications.
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More JAZ in the orchestration of jasmonate-mediated plant defense
Prof.dr. J. Memelink