1,534 zoekresultaten voor “sun and strw versus” in de Publieke website
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X-Raying the hot gas in the outskirts of galaxy clusters
Forming at the nodes of the Cosmic Web and growing hierarchically via mass accretion, galaxy clusters are the largest virialized halos in our universe, composed of dark matter (DM; ≥85%), ionized hot plasma in the intracluster medium (ICM; ≥10-15%), and galaxies (≥1-5%).
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Far from home: the science exploitation of the fastest Milky Way stars
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.
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Dawn of the red and dead: stellar kinematics of massive quiescent galaxies out to z = 2
Promotores: Prof.dr. M. Franx, Prof.dr. M. Kriek (Univ. of California at Berkeley)
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Star formation and aging at cosmic noon: the spectral evolution of galaxies from z=2
Promotores: Prof.dr. M. Franx, Prof.dr. P.G. van Dokkum (Yale University)
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Hunting for new physics in the primordial Universe
This thesis contributes to studying primordial cosmology theories and their detectability in future observations.
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Hydrocarbons in interstellar ice analogues: UV-vis spectroscopy and VUV photochemistry
Promotor: Prof.dr. H.L.V. Linnartz
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Feedback from deeply embedded low- and high-mass protostars. Surveying hot molecular gas with Herschel
Promotor: Prof.dr. E.F. van Dishoeck, Co-Promotor: G.J. Herczeg
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Probing cosmic monsters: confronting hydrodynamic simulations with new observations of high-density environments
Galaxies in the Universe are distributed along the intricate framework of the Cosmic Web. Groups and clusters of galaxies comprise the densest regions in this network, and therefore, are excellent cosmic laboratories to study different aspects of galaxy evolution in extreme environments.
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A fresh view on carbon radio recombination lines powered by LOFAR
The Low Frequency Array enables studies of low-frequency carbon radio recombination lines with unprecedented sensitivity, spectral and spatial resolution.
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The Evolutionary Tale of Gaseous Exoplanets
This thesis investigates the evolution and fate of gaseous exoplanets, which are continuously shaped by stellar activity across both short and long timescales.
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High-resolution integral-field spectroscopy of exoplanets
This thesis describes the implementation and on-sky demonstration of high-resolution integral-field spectroscopy for extreme adaptive optics systems that are used to find and characterize exoplanets.
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They grow up so fast - Stellar accretion in a starburst cluster
When a star is born in our Galaxy, it is quite likely that it has formed within a massive cluster, which hosts numerous high-mass stars bathing their lower mass neighbours in UV radiation.
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Vuurbol boven Nederland: 'Meteoriet van deze grootte is vrij zeldzaam'
Vorige week trok een meteoriet over ons land, die uiteindelijk in Duitsland neerkwam. Bij Goedemorgen Nederland vertelt hoogleraar Vincent Icke waarom een meteoriet een bijzondere verschijning is.
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Unraveling the surface formation of regular and deuterated water in space: a combined laboratory and computational study
Promotor: Prof.dr. H.V.J. Linnartz
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A song of ice and gas: the formation and evolution of complex organic molecules
Understanding how chemical complexity emerges during star formation requires connecting molecular material preserved in interstellar ices with that observed in the gas phase after protostellar heating begins.
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Modelling escaping atmospheres of highly irradiated exoplanets
Exoplanets close in to their host star receive high levels of extreme ultraviolet (EUV) irradiation, capable of heating and ultimately driving the hydrodynamic escape of their atmospheres.
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Wim van AnrooijFaculteit der Geesteswetenschappen
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Prijzen en subsidies 2025
Op deze pagina vind je een overzicht van prijzen en subsidies die in 2025 zijn toegekend aan onze medewerkers en studenten, en de bijzondere benoemingen aan de Universiteit Leiden en andere instellingen.
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Sociale veiligheid, diversiteit en inclusie
De Faculteit der Sociale Wetenschappen zet zich in om een veilige, comfortabele en rechtvaardige plek te zijn voor zowel medewerkers als studenten: een plek waar een diversiteit aan mensen zich gewaardeerd en welkom voelt. Waar ruimte is voor een diversiteit aan perspectieven.
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identities of non-native teachers of English: an exploration in China and the Netherlands
Leraren Engels in China en Nederland hebben verschillende beelden en verwachtingen van zichzelf in relatie tot de Engelse en Amerikaanse cultuur.
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Faculteit der Sociale Wetenschappen
Binnen de Faculteit der Sociale Wetenschappen wordt, op het gebied van de culturele antropologie, pedagogiek, politicologie en psychologie, onderzoek gedaan en onderwijs gegeven dat intensief is verbonden met de maatschappij. Dit is ook het uitgangspunt van de gastlessen die deze faculteit biedt.
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eLaw Conferenties
eLaw organiseert een reeks impactvolle conferenties waarin experts uit het recht, de technologie en de samenleving samenkomen om belangrijke ontwikkelingen op dit gebied te bespreken.
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Ontdek Leidse wetenschapsplekjes via Atlas Obscura
De Leidse muurformules, de wasbak van Einstein of de handtekeningenmuur van Ehrenfest. Het zijn slechts een paar van de verborgen wetenschapsschatten die Leiden te bieden heeft. Alumnus van de Leidse Sterrewacht Alex Pietrow beschreef een enkele van deze plekjes op reiswebsite Atlas Obscura.
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Verplichte Matching
Voor Sterrenkunde is de matchingsactiviteit een verplicht onderdeel van de toelatingsprocedure voor studenten met een Nederlandse vooropleiding.
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Tien jaar Life Science and Technology
Op 9 september 2009 viert de opleiding Life Science and Technology (LS&T) haar tienjarig bestaan.
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Marcel SchaafFaculteit der Wiskunde en Natuurwetenschappen
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Christian TudoracheFaculteit der Wiskunde en Natuurwetenschappen
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Prijzen en subsidies 2026
Op deze pagina vind je een overzicht van prijzen en subsidies die in 2026 zijn toegekend aan onze medewerkers en studenten, en de bijzondere benoemingen aan de Universiteit Leiden en andere instellingen.
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Dynamics and radiation from tidal disruption events
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).
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Shining Light on PAHs in Space
Polycyclic aromatic hydrocarbons (PAHs) are the most abundant class of organic compounds in space. The PAH field evolves from the constant interaction between experimentalists, theorists, modellers and observers. While laboratory research and quantum chemical calculations together set up the molecular…
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Small scale kinematics of massive star-forming cores
Promotor: Prof.dr. E.F. van Dishoeck, Co-Promotor: M.R. Hogerheijde
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Molecular diagnostics of dense regions in nearby galaxies
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.
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L.A.D. F. Kaiser
Het Leids Astronomisch Dispuut Frederik Kaiser is een vereniging die zich inzet voor de studenten die in Leiden sterrenkunde studeren. Daarnaast zijn ze ook erg betrokken bij de publieksactiviteiten in de Oude Sterrewacht en helpen ze bij de ontwikkeling en uitvoering van andere projecten in het geb…
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Studies of dust and gas in the interstellar medium of the Milky Way
Promotor: Prof.dr. A.G.G.M. Tielens
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The trials and tribulations of PAHs in asteroids: investigating aqueous alteration of polycyclic aromatic hydrocarbons under asteroidal conditions
Carbonaceous asteroids preserve a record of early solar system processes, where minerals and organic molecules, like polycyclic aromatic hydrocarbons (PAHs), offer clues to planetary evolution and prebiotic chemistry.
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Patterned detectors: From design to science
Patterned detectors are an existing technology that can be found in almost all color cameras.
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Non-equilibrium chemistry and cooling in simulations of galaxy formation
Promotor: J. Schaye
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The Demographics of Protoplanetary Disks: from Lupus to Orion
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.
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Infrared spectroscopy of astrophysically relevant hydrocarbons
This thesis is about the study of hydrocarbons via infrared spectroscopy.
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Not so smooth after all: resolving dust and gas structures in protoplanetary disks
A large diversity of exoplanetary systems has been found, but it is still unclear what drives this diversity.
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High-Contrast Imaging of Protoplanetary Disks
To study how planetary systems come into existence we study much younger systems still in formation.
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The Ornithology of the Baudin expedition (1800-1804)
The expedition commanded by Nicolas Baudin to Tenerife, Mauritius, Australia, Timor and South Africa in 1800-1804 is fully researched in regard to ornithology.
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Weighing the Dark: Cosmological Applications of Gravitational Lensing
Promotor: K. Kuijken, Co-Promotor: H. Hoekstra
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Galaxy clusters in the decameter sky
Many galaxy clusters exhibit bright diffuse radio emission that traces the underlying structure of the intracluster medium (ICM).
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Electronic spectroscopy of molecules of astrophysical interest
This thesis revolves around the electronic spectroscopy of molecules in the laboratory and the search for the carriers of the diffuse interstellar bands (DIBs).
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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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The dust and molecular gas in the torus of NGC 1068
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.
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Hunting dark matter with X-rays
Promotor: A. Achúcarro Co-promotor: A. Boyarsky
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Novel approaches for direct exoplanet imaging: theory, simulations and experiments
The next generation of high-contrast imaging instruments on space-based observatories requires sophisticated wavefront sensing and control in addition to a high-performance coronagraph.
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Monsters in the Deep: Using simulations to understand the excess baryonic mass in the centres of high-mass, early-type galaxies
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…