169 zoekresultaten voor “interstellar medium” in de Publieke website
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Tales of Orion: the interplay of gas, dust, and stars in the interstellar medium
Promotores: Prof.dr. A.G.G.M. Tielens, Prof.dr. L. Kaper (UvA)
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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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Modeling interstellar bubbles: near and far
Promotor: Prof. dr. A.G.G.M. Tielens
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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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X-ray spectroscopy of interstellar dust: from the laboratory to the Galaxy
In this thesis, we present new laboratory data of interstellar dust analogues.
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Xander Tielens wordt hoogleraar ‘Physics and Chemistry of the Interstellar Medium‘
Prof. A.G.G.M. (Xander) Tielens wordt bij 1 januari bij de Faculteit der Wiskunde en Natuurwetenschappen benoemd tot hoogleraar ‘Physics and Chemistry of the Interstellar Medium’. Tielens werkt momenteel als senior onderzoeker bij Ames in Moffett Field, Californië. Ames is een onderdeel van NASA. Daarnaast…
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Shining Light on Interstellar Matter
Promotor: H.V.J. Linnartz
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Resolving gas-phase metallicity in galaxies
Galaxies are environments where gas coalesces, cools, and is converted into stars. However, it remains unclear the exact mechanisms through which galaxies acquire, redistribute and lose their gas.
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Breaking & Entering: PAH photodissociation and top-down chemistry
Laboratory, observation and modeling work on the dissociation of polycyclic aromatic hydrocarbons in interstellar environments and the formation of new molecular species through the fragmentation process.
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Exploring the magnetic, turbulent Milky Way through radio waves
Promotor: Prof.dr. H. J. A. Röttgering, Co-Promotor: M. Haverkorn
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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.
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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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Radio galaxies at low frequencies: high spatial and spectral resolution studies with LOFAR
Promotor: H.J.A. Röttgering, Co-promotor: G.K. Miley
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The astrochemical factory: A solid base for interstellar reactions
In this thesis chemical and physical processes in the ice mantles on interstellar dust grains are studied.
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Dynamics of the Oort Cloud and Formation of Interstellar Comets Santiago Torres Rodriguez
The solar system was formed approximately 4.56 billion years ago. Despite the numerous theories that have been developed over the years, the formation and evolution of the solar system still remain unclear.
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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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Atom addition reactions in interstellar ice - new pathways towards molecular complexity in space -
Promotor: Prof.dr. H.V.J. Linnartz, Co-Promotores: S. Ioppolo, H.M. Cuppen
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Identifying the origins of galaxy formation
This thesis investigates how galaxies form and what diversifies the evolutionary histories of galaxies.
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Diagnostics for mechanical heating in star-forming galaxies
Promotor: F.P. Israel, Co-Promoter: R. Meijerink
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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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clusters: observing the chemical enrichment in the hot intra-cluster medium
Promotor: Jelle S. Kaastra Co-promotor: Jelle de Plaa
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Uit Leidse dozen. Brochures als medium in de discussies tussen protestantse modernen en katholieken, 1840-1870
Ineke Smit verdedigde haar proefschrift op 17 september 2019
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Staren naar het sterrenstof
Stofdeeltjes in de ruimte vormen de basis voor nieuwe sterren en planeten. Maar waar bestaan die stofdeeltjes uit, en hoe gedragen ze zich? Sascha Zeegers onderzocht het. Promotie op 1 november.
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Investment Grant NWO Medium for Simon Portegies Zwart
A revolutionary supercomputer with energy-efficient parts that are available in the shops. Professor of Computational Astrophysics Simon Portegies Zwart has been awarded an NWO Medium Grant to build this processing giant, which will have the power of a supercomputer but requires only one percent of…
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Jonge sterren in de Orionnevel doen aan geboortebeperking
Astronomen van de Universiteit Leiden hebben in data van het SOFIA observatorium ontdekt dat de sterrenwind van een pasgeboren ster in de Orionnevel verhindert dat er in de directe omgeving meer sterren worden gevormd. Dat maakte coauteur Xander Tielens bekend tijdens een persconferentie op de 233ste…
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Bernhard Brandl
Wiskunde en Natuurwetenschappen
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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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Metals in the diffuse gas around high-redshift galaxies
Promotores: Prof.dr. J. Schaye & Prof.dr. C. Steidel (California Institute of Technology)
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Vier NWO-TOP subsidies voor Leidse astronomen en één voor wiskunde
NWO heeft vier TOP subsidies toegekend voor Leidse astronomen en één voor een Leidse wiskundige, landelijk zijn er 19 subsidies toekend aan exacte wetenschappers. De onderzoeken van prof. Xander Tielens met prof. Huub Rottgering, dr. Michiel Hogerheijde en dr. Jelle Kaastra zijn gehonoreerd met een…
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Revealing the nature of new low-frequency radio source populations
It has now been well established that shocks and turbulent motions in the intra-cluster medium (ICM) generated through cluster mergers can produce large-scale synchrotron emission.
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Shining Light on Interstellar Matter
Promotie
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A molecular journey : tales of sublimating ices from hot cores to comets
The thesis explores how interstellar chemistry evolves as a function of time and changing physical architectures during the formation of stars.
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Galaxy formation traced by heavy element pollution
Galaxies form and evolve through close interaction with their surroundings. As a result, the heavy elements ('metals') that are synthesized in stars, are found both inside and outside galaxies.
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Dark Ice Chemistry in Interstellar Clouds
Promotie
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This Week’s Discoveries | 14 November 2017
Lezing
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The Desire of the Medium
Promotie
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The astrochemical factory: A solid base for interstellar reactions
Promotie
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Aminozuur glycine kan ontstaan in donker heelal
Een internationaal team van laboratorium-astrofysici en astrochemici heeft aangetoond dat glycine, het eenvoudigste aminozuur en een belangrijke bouwsteen van het leven, kan ontstaan onder de barre omstandigheden die in de ruimte heersen. De resultaten worden maandagavond gepubliceerd in Nature Astr…
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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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ONLINE | Dynamics of the Oort Cloud and Formation of Interstellar Comets
Promotie
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The interplay between lipids and the immune system in atherosclerosis
Cardiovascular diseases are among the most frequent causes of death in the world. The main underlying pathology of cardiovascular diseases is the development of atherosclerosis in the medium and large-sized arteries.
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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.
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X-ray spectroscopy of interstellar dust: From the laboratory to the Galaxy
Promotie
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The early stress response of jasmonic acid in cell suspension cultures of Catharanthus roseus
In order to gain a better insight into the basis of the rapid jasmonic acid (JA)-mediated stress response, an integrated approach using a targeted high-resolution mass spectrometry-based (HRMS) platform, was conducted to monitor the metabolism of JA using the model system of cell suspension cultures…
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Molecules during stellar formation and death
Promotor: Prof.dr. E. F. van Dishoeck
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Neutrinos From the Milky Way
Promotor: Prof.dr. M. de Jong
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Inextricable ties between chemical complexity and dynamics of embedded protostellar regions
Promotor: E. F. van Dishoeck, Co-promotor: C. Walsh
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Reconstructing Magnetic Fields of Spiral Galaxies from Radiopolarimetric Observations
Promotor: H.J.A. Röttgering, Co-promotor: M. Haverkorn
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This Week’s Discoveries | 6 March 2018
Lezing
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Development of an in vitro vascular network using zebrafish embryonic cells
One of the major limitations in culturing complex tissues or organs is the lack of vascularization in the cultured tissue. Development of a functional capillary bed could overcome this problem.