164 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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UV Photodesorption and Photoconversion of Interstellar Ices
This thesis is an experimental study of the UV irradiation of the interstellar ice analogues, relevant for the different stages of the star and planet formation sequence.
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Interstellar Catalysts and the PAH universe
Organic molecules in interstellar space are important as they influence the structure of galaxies and star formations. Studying catalytic processes in space allows us to understand how molecular species are formed and chemically evolved in the interstellar medium and solar system objects.
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Modeling interstellar bubbles: near and far
Promotor: Prof. dr. A.G.G.M. Tielens
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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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Shining Light on Interstellar Matter
Promotor: H.V.J. Linnartz
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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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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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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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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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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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Exploring the magnetic, turbulent Milky Way through radio waves
Promotor: Prof.dr. H. J. A. Röttgering, Co-Promotor: M. Haverkorn
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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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From Star-formation to Recombination: Expanding our View of the Radio-Recombination-Line Universe
The origin and evolution of galaxies are closely tied to the cyclic feedback processes between stars and the interstellar medium (ISM).
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Orion's Dragon and Other Stories
Stellar feedback is a crucial ingredient in the evolution of galaxies.
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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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Cold gas in distant galaxies
The formation and evolution of galaxies is fundamentally driven by the formation of new stars out of cold gas.
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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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Infrared spectroscopy of astrophysically relevant hydrocarbons
This thesis is about the study of hydrocarbons via infrared spectroscopy.
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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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Bernhard Brandl
Wiskunde en Natuurwetenschappen
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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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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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Merging galaxy clusters: probing magnetism and particle acceleration over cosmic time
In this thesis, I studied the origin and evolution of the non-thermal radiation in merging galaxy clusters.
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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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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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Interstellar Catalysts and the PAH universe
Promotie
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Dark Ice Chemistry in Interstellar Clouds
Promotie
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X-raying extragalactic gas: warm-hot gas in the EAGLE simulations
I have studied the hot, diffuse gas around and between galaxies. Specifically, I have used the EAGLE numerical simulations of galaxy formation to predict the properties of this gas, and I have used those properties to predict specific observables: soft X-ray absorption and emission lines.
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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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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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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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Neutrinos From the Milky Way
Promotor: Prof.dr. M. de Jong
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Molecules during stellar formation and death
Promotor: Prof.dr. E. F. van Dishoeck
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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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Popular Music in Southeast Asia
From the 1920s on, popular music in Southeast Asia was a mass-audience phenomenon that drew new connections between indigenous musical styles and contemporary genres from elsewhere to create new, hybrid forms. This book presents a cultural history of modern Southeast Asia from the vantage point of popular…
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Dancing with the Stars
This thesis develops a method for direction dependent calibration of the ionosphere in radio interferometric data.