452 search results for “darkness” in the Public website
-
Probing the darkness: the link between baryons and dark matter
Promotor: Prof.dr. J. Schaye, Co-promotor: Marcello Cacciato
-
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”.
-
Hunting dark matter with X-rays
Promotor: A. Achúcarro Co-promotor: A. Boyarsky
-
Galactic substructures as tracers of dark matter and stellar evolution
One of the most important puzzles in modern astrophysics is the nature of dark matter.
-
Dark ice chemistry in interstellar clouds
This thesis is largely an experimental study on the formation of solid-state simple and complex organic molecules in the H2O-rich and CO-rich ice phases of dense interstellar clouds and dark cores.
-
Lights in a sea of darkness: constraining the nature and properties of dark matter using the stellar kinematics in the centres of ultra-faint
Dark matter is one of the biggest mysteries of the Universe. Its properties cannot be explained with the known laws of physics and elementary particles.
-
Unveiling dark structures with accurate weak lensing
Improvements of weak gravitational lensing shape measurements are presented and some used for data analysis.
-
Predicting crime in dark web forum networks
In this project, we use social network analysis to analyze the behavior of users in online forums and associated marketplaces over time.
-
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.
-
Probing the properties of dark matter particles with astrophysical observations
It is an established fact that the Standard Model has to be extended to explain the so-called Beyond the Standard Model (BSM) phenomena: dark matter, matter-antimatter asymmetry of the Universe and neutrino flavour oscillations.
-
Weighing the Dark: Cosmological Applications of Gravitational Lensing
Promotor: K. Kuijken, Co-Promotor: H. Hoekstra
-
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).
-
Henk Hoekstra
Science
hoekstra@strw.leidenuniv.nl | +31 71 527 5594
-
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.
-
The Dark Middle Ages: Language of Vice in Histories of Science, 1700-1900
In comparing a selection of 18th-century histories to a representative sample of 19th-century histories of science, this project inquires: Which early modern vices persisted into the 19th century and to what extent were those vices embodied in anecdotes, conveyed through commonplaces, or symbolically…
-
Exhibition - Hello Darkness, My Old Friend: Shadowy art from Leiden University Libraries
Ominous witches, gruesome monsters, and hideous freaks: from Saturday 15 June, Kunsthal Rotterdam will be putting the spotlight on the shady depths of human imagination in the exhibition Hello darkness, my old friend. Seventy works on paper from the collection of the Leiden University Libraries confront…
-
New light on dark matter
An international team of astronomers has found an unexpected link between dark matter and visible stars in stellar systems. This discovery may even cause us to reconsider our understanding of gravity. They published on their discovery in 'Nature' on 1 October.
-
Astronomers make invisible dark matter visible
An international team of astronomers, including Professor Koen Kuijken, has published a series of online articles presenting the first results of a major search for dark matter. Never before have researchers been able to chart so precisely the characteristics of groups of galaxies and their dark matter.…
-
ERC Advanced Grant for dark matter research
Dark matter. Something invisible that, according to calculations, comprises about 85% of the matter in the universe. With an ERC Advanced Grant of €2.5 million, Professor of Observational Cosmology Henk Hoekstra will map out even more precisely where this dark matter is to be found.
-
A matter of dark matter
Is our universe built up out of warm or cold dark matter? The standard model assumes cold dark matter particles, but astronomer Sylvia Ploeckinger is now testing the possibility of a warm counterpart: sterile neutrino’s. For this project, she received an NWO Physics/F grant, a special grant for women…
-
Alexey Boiarskyi
Science
boyarsky@lorentz.leidenuniv.nl | +31 71 527 5514
-
Important Step for Dark Matter Experiment CERN
Particle lab CERN gives the green light for the test phase of an experiment that aims to produce dark matter particles. Physicist Alexey Boyarsky is one of the initiators.
-
Galaxy without dark matter discovered
Astronomers led by Pieter van Dokkum have discovered a galaxy that barely contains any dark matter, which actually proves that dark matter does indeed exist. The research results will be published this week in Nature.
-
Shedding light on the dark side of the universe
It must be there. We just cannot see it: mysterious dark matter and dark energy in the universe. Henk Hoekstra is one of the many cosmologists who would love to know what exactly these substances consist of. He has received a European research grant of 1.3 euro million to find out.
-
Marie Curie grant for dark matter
Leiden Observatory is going to use a new technique to carry out calculations on gravitational lensing measurements. They will do this is the context of research into the formation of elliptical galaxies. Alessandro Sonnenfeld (University of Tokyo) who developed this technique joined the research team…
-
Glycine in space produced by dark chemistry
An international team of laboratory astrophysicists and astrochemical modellers has shown that glycine, the simplest amino acid and an important building block of life, can form under the harsh conditions that govern chemistry in space. The results have been published this week in Nature Astronomy and…
-
Go ahead for Dark Matter experiment
CERN has approved the construction and operation of SND@LHC, a neutrino detector at the Large Hadron Collider. It's a precursor for SHiP, a detector meant to detect dark matter. Leiden physicist Alexey Boyarsky is one of the initiators of both SHiP and SND@LHC.
-
Spirits as medicine for a dark past
Spirits play a important role in post-colonial and minority literature as a means of processing black pages from history, according to literary scientist Chia-Sui Lee. PhD defence 11 January.
-
Uncovering galaxy evolution and the nature of dark matter
Dark matter represents around eighty per cent of the total mass in the Universe. Yet, we still don't really know what it's made of. Astronomer Pavel Mancera Piña is looking for answers. With a Veni grant from NWO and the most advanced telescopes, such as the James Webb Space Telescope, he will investigate…
-
big space mission: ‘This is a big step towards understanding dark matter and dark energy.’
Henk Hoekstra and Alessandra Silvestri work on the astronomy and theoretical physics in the Euclid mission. These Dutch researchers are part of the mission.
-
What is dark matter? Dwarf galaxies offer new insight
By looking at stars in dwarf galaxies research Bas Zoutendijk is trying to gain new insight into dark matter.
-
How Euclid will reveal the dark side of the Universe
ESA’s Euclid mission is to reveal the dark side of the Universe. But how? Professor of Observational cosmology Henk Hoekstra explains it in his interview with Space Team Europe and Horizon Magazine. He uses enlightening examples such as… a swimming pool! Listen to Henk Hoekstra to understand how Euclid…
-
Physics student Hidde Stoffels investigates dark matter in outstanding undergraduate thesis
He makes music, goes to the athletics track twice a week and, according to his supervisor, has done his research so well that it would not be out of place in a PhD research. Physics and astronomy student Hidde Stoffels' undergraduate research on the properties of dark matter is of such high quality…
-
FLAMINGO: dark matter, ordinary matter, and neutrinos in the biggest cosmological simulation ever
Not only dark matter, but also ordinary matter and dark energy are tracked in the largest ever cosmological computer simulation ever. In the FLAMINGO simulations, you can see virtual galaxies and clusters of galaxies emerging over the course of billions of years. This is no easy task: with more than…
-
‘Standing Room Only’ at eLaw’s CPDP Panel on 'Dark Patterns and Data-Driven Manipulation'
With the conference circuit slowly reopening after Covid forced almost all academic interactions online, thousands of conference attendees descended on Brussels for Europe’s largest technology conference. eLaw’s annual sponsorship of one of the many CPDP conference panels brought a diverse range of…
-
The promises and the dark side of stem cells
Geneticist Hans Clevers will give the first Niko Tinbergen lecture new style on 10 December, which is all about stem cells. The young Leiden professors Ariane Briegel and Susana Chuva de Sousa Lopes talk about bacterial noses and the cultivation of egg cells in the lab in short introductory lectures…
-
Major NWO subsidies for research on dark matter and quantum experiments
Astronomer Koen Kuijken and physicist Tjerk Oosterkamp have each been awarded a major subsidy by NWO. The funding will allow them to construct new research facilities.
-
This is how ESA telescope Euclid is going to visualise dark matter
How can you see something that’s invisible? Well, with Euclid! This future ESA telescope will map the structure of the Universe and teach us more about invisible dark matter and dark energy. Scientific coordinator of Euclid and Leiden astronomer Henk Hoekstra explains how this works.
-
A new step in the search for the origin of dark matter
A signal that is present both in the centre of our Milky Way and in distant places in the universe could reveal the origin of dark matter. This is what Leiden physicist Alexey Boyarsky concludes in an article in Physical Review Letters.
-
Probing Gravity at Cosmic Scales
The theoretical explanation of cosmic acceleration is nowadays one of the biggest puzzles in cosmology.
-
Dark matter with a hint of Leiden shines at Dublin gallery
A glittering visualisation of dark matter by Dutch artist Thijs Biersteker is on display in the Science Gallery at Trinity College Dublin. The installation – ‘Dark Distortions’ – was inspired by Euclid, a forthcoming ESA mission to study the mysterious nature of dark matter. Leiden astronomer Henk Hoekstra…
-
Decolonisation in art: 'That darkness says: up to here and no further'
It was not light, but its absence that caught Stephanie Noach's attention a few years ago. With her research on darkness in art, she aims to show how darkness can question and sometimes even undermine colonial imagery.
-
ESOF session shines a light on the dark side of our universe
Cosmologists can measure with increasing precision how the universe is expanding and changing. This is producing unexpected results and causing cracks in our picture of the universe. At the ESOF session The Dark Side of our Mysterious Universe, cosmologists, astronomers and philosophers will discuss…
-
Afraid of the dark? Anke Klein: 'Let your child have a say in finding a solution'
On Sunday night 25 September, all the lights in Leiden will switch off and we will see the starry sky above us twinkling in all its glory. A unique opportunity for all residents of Leiden to experience the vastness of the cosmos and view the impressive artwork that hangs over our heads every night.…
-
Data analysis of dark web forums in the fight against child sexual abuse
By far the majority of users of child sexual abuse networks (or child porn forums as they are sometimes called) on the dark web do not actively communicate there but download illegal material, therefore committing a criminal offence. But they often stay under the police and judiciary’s radar. PhD candidate…
-
Catching stars to reveal the secrets of the darkness: ERC Consolidator for Elena Maria Rossi
The centre of our Galaxy is so dark and dense that it is almost impossible to observe what is inside. By catching the rare hypervelocity stars that are ejected from it, Elena Maria Rossi aims to unveil the mysterious environment around the supermassive black hole inside. But she’ll also be solving another…
-
Opening lecture “Traveling through Europe’s darkness and daylight – A geopolitical Odyssey”
The master programme was officially opened by H.E. Kees Klompenhouwer – the Ambassador of the Netherlands to the Czech Republic. During his lecture, entitled “Traveling through Europe’s darkness and daylight – A geopolitical Odyssey”, Ambassador Klompenhouwer shared valuable insights on the history…
-
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.
-
Dark Matters
PhD defence
-
The connection between mass and light in galaxy clusters
Promotor: Koen Kuijken Co-promotor: Henk Hoekstra