444 search results for “supermassive black hours” in the Public website
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24-hour rhythms in drug exposure and effect
Although rarely considered by the pharmaceutical industry or clinicians, 24-hour rhythms in physiology are a factor of potential influence on the pharmacokinetics and pharmacodynamics of drugs.
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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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Neutrino linked to black hole that devours star
For only the second time ever, astronomers have linked a neutrino to an object outside our Milky Way. These observations were made using telescopes both on Earth and in space. The researchers, including Leiden astronomer Sjoert van Velzen, were able to trace the neutrino to a black hole that is devouring…
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Hierarchical Systems
The thesis addresses the long-term dynamical evolution of hierarchical multiple systems.
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Black lives matter: ‘Why the American protests have resonated in the Netherlands’
The death of George Floyd at the hands of the police may have sparked the Black Lives Matter protests in the United States and here in the Netherlands, but they are about more than that alone. We asked Karwan Fatah-Black, a historian who specialises in the Dutch colonial history, for his analysis. ‘We…
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The spin evolution of accreting and radio pulsars in binary systems
Pulsars were first discovered in 1967 and since then the population has grown and expanded over several wavelengths.
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Black lives matter: ‘Racism takes different forms but it’s a world issue’
It all started with demonstrations protesting about the death of George Floyd from police brutality in Minneapolis, but the Black Lives Matter protest is spreading like wildfire across the whole of the US. Every day, thousands of people are taking to the streets. We asked American Studies expert Sara…
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Volcanic ‘activity’ in black holes blows monumental bubbles of hundreds of thousands of light-years
An international team of researchers observed the full extent of the evolution of hot gas produced by an active black hole for the first time. As it evolves, the hot gas encompasses a much larger area than previously thought and even impacts objects residing at great distances. Their study is published…
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Ager Venusinus Project
The Ager Venusinus Project studies the relatively small number of recognized colonial dwellings dated securely to the period of colonization (i.e. the 3rd century BC). With a special interest in the Black Gloss ceramic typochronology
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What happens when two galaxies collide?
When galaxies collide, do the black holes at their centre form a supersized black hole? This is what we think happens, but it's not as simple as that, according to Simon Portegies Zwart. Zwart, computer scientist and astronomer, has been awarded a VICI grant to research this phenomenon.
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Landscapes of Survival
The Archaeology and Epigraphy of Jordan’s North-Eastern Desert and Beyond
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Huib van Langevelde new director Event Horizon Telescope
The Leiden astronomer Huib van Langevelde) has been selected as the new director of the Event Horizon Telescope (EHT). The EHT is a collaboration involving about 350 scientists from 18 countries. It combines the ALMA array in Chile with sub-millimeter telescopes around the world and published the first…
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The Great Collapse
Promotor: Prof.dr. S.F. Portegies Zwart
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Jebel Qurma Archaeological Landscape Project
The project seeks to come to an understanding of the archaeology of the desert and the ways in which its inhabitants engaged with their constraint, marginal environments through time. It compares and interprets site distribution and community organisation over a long time scale and across several different…
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Earth Hour 2021
Every year, at 8:30 pm on the last Saturday of March, millions of people across the world join in raising awareness of the issues facing our planet.
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First discovery of high-energy neutrino source
For the first time, scientists have traced back a high-energy neutrino to its source in space. It was produced by a so-called blazar—a supermassive black hole. Researchers from neutrino detector IceCube report this in Science. ‘This is a milestone for neutrino science,’ says physicist Dorothea Samtleben…
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The colours of the extreme universe
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.
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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…
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Democratization and political terrorism: The formation and destruction of the two-party system in the Red River Valley of Louisiana, 1865-1868
The project examines the political conflict in the Red River Valley of Louisiana between the majority-black Republican Party and the overwhelmingly white Democratic Party by studying the composition and actions of each party.
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Opening hours Schouwburgstraat building extended
Over the last couple of weeks, the opening of the Schouwburgstraat building during the weekends turned out to be a great success. Therefore, the opening hours will be extended. Starting Saturday 30 May 2015, the Schouwburgstraat building will be open from 10.00 to 23.00 hrs. on Saturdays and Sunday…
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Opening hours during the Holidays
The Opening Hours of the Faculty during the Holidays are:
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Koenraad Schalm Group - String Theory and Experiment
Truth is stranger than fiction. In 1997 Juan Maldaceña discovered a remarkable dictionary that translates equation for equation the physics of black holes in string theory into the more conventional physics of quantum mechanics of interacting particles. The remarkable possibility exists that…
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New detection method for quasars in the early Universe
Astronomers from Leiden Observatory have developed a new method to find distant quasars and better distinguish them from other objects that look like them, using machine learning techniques. The research result has been accepted for publication in the journal Astronomy & Astrophysics. It is the last…
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Second World War victims commemorated in Hour of Remembrance
On 4 May, Leiden University remembered the victims of the Second World War from our university community. Alumni, students and present and former staff of the University came together for this Hour of Remembrance.
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Photographic Traditions in South African Popular Modernities
In the South African context, certain iconic images have been a dominant source for public understandings of historical events. The emphasis given these images tends to overshadow the historical value of other more personal photographic sources – like studio or amateur photography. This project looks…
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Kinetic Landscapes
The Cide Archaeological Project: Surveying the Turkish Western Black Sea Region
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Radio galaxies near the epoch of reionisation
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.
- Dutch Missionaries and Deaf Education in Africa between 1960-1990
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From Big Bang to algorithm
Smart algorithms and powerful processors are just as essential for astronomy as big telescopes. Astronomers at Leiden University therefore constantly operate at the interface between astronomy and data science.
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A well-established harmony in chaos: from isolated galaxies to galaxy clusters
The origin and evolution of galaxies are closely linked to many different physical phenomena.
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Mobile peoples - permanent places
This dissertation is a study of archaeological remains left behind by nomadic communities in the Black Desert, situated in the northeast of modern Jordan.
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Frontiers of the Roman Empire: The Eastern Frontiers
This volume considers the military architecture and its impact on local communities in Rome's eastern frontier, which stretched from the north-east shore of the Black Sea to the Red Sea.
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Astronomy Council statement on racism
On behalf of the Dutch astronomical community, we unequivocally condemn the brutal killings of Ahmaud Arbery, George Floyd, and Breonna Taylor and countless others and instances of racism.
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Change in opening hours around Ascension Day
Many University buildings will be closed on Thursday 25 and Friday 26 May in connection with Ascension Day.
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Opening hours over Good Friday and Easter
On Good Friday (30 March) and Easter Sunday and Monday (1 and 2 April) most Leiden University premises are closed. Both the University Library and Wijnhaven Library will be open on Good Friday and on Saturday 31 March.
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Galaxies and the structures in which they are embedded
Researchers at Leiden Observatory study the fundamental physics that creates structure in the Universe. These processes collect matter into galaxies and gas into stars. With the use of powerful telescopes and advanced calculations and computer simulations, Leiden astronomers seek to understand the origin,…
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Galaxies and the structures in which they are embedded
Researchers at Leiden Observatory study the fundamental physics that creates structure in the Universe. These processes collect matter into galaxies and gas into stars. With the use of powerful telescopes and advanced calculations and computer simulations, Leiden astronomers seek to understand the origin,…
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Research Projects, Categories and Supervisors
These are the proposed research projects for LEAPS 2019. Please note that not all projects will go ahead and some may still be added in the near future. Final funding decisions lie with the Faculty sponsors. And please make a note that if you are interested in an ESA project, to check if your state…
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News
A selection of news from Leiden University.
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African Activism at the UN
Subproject of the ERC project 'Challenging the Liberal World Order from Within: The Invisible History of the United Nations and the Global South'.
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Subodh Patil Group - Particle Cosmology
Our research primarily focuses on the early universe and its origins in theories that go beyond the Standard Model of particle physics.
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Neutral outflows in high-redshift dusty galaxies
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…
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Family, Work and Household in Late Medieval Iberia
Family, Work, and Household presents the social and occupational life of a late medieval Iberian town in rich, unprecedented detail. The book combines a diachronic study of two regionally prominent families—one knightly and one mercantile—with a detailed cross-sectional urban study of household and…
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The Rise and Decline of an Iberian Bourgeoisie
The Rise and Decline of an Iberian Bourgeoisie is one of the first long-term studies in English of an Iberian town during the late medieval crisis. Focusing on the Catalonian city of Manresa, Jeff Fynn-Paul expertly integrates Iberian historiography with European narratives to place the city's social,…
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NWO Free Competition Grant for Al-Jallad and Akkermans
Dr. Ahmad Al-Jallad and Prof.dr. Peter Akkermans have been awarded with the NWO Free Competition Grant for their research project 'Landscapes of Survival: Pastoralist Societies, Rock Art and Literacy in Jordan's Black Desert, c. 1000 BC to 500 AD'. Together, they study settlements, burials and inscr…
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Start of construction of camera for European giant telescope
Leiden scientists will be working on the development of a camera for the European Extremely Large Telescope that is currently under construction. On 28 September the Netherlands Research School for Astronomy signed an agreement with the European Southern Observatory.
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Lectures at Science
From black holes to artificial intelligence and from drug research to data science: welcome to the fascinating world of the Faculty of Science. Our researchers, students and guests regularly give public lectures about their work. You are welcome to attend.
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About this minor
Everything you need to know about the minor Cultural Memory of War and Conflict.
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Dutch Atlantic Connections, 1680-1800: Linking Empires, Bridging Borders
In 'Dutch Atlantic Connections, 1680-1800', Gert Oostindie and Jessica V. Roitman, both of the Royal Netherlands Institute of Southeast Asian and Caribbean Studies (KITLV) and also affiliated with the History Institute of Leiden University, assemble an internationally acclaimed selection of authors,…