351 search results for “stellar leiden” in the Public website
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Clues from stellar catastrophes
Promotores: S.F. Portegies Zwart, E. M. Rossi
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Stellar radio beacons for Galactic astrometry
A century ago, it was unclear whether the stars in the sky were clustered in groups, or widely spread in the universe.
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Early stellar galaxies
Franx
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Structure and substructure in the stellar halo of the Milky Way
Promotor: K.H. Kuijken
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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.
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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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The distribution of stellar mass in galaxy clusters over cosmic time
Promotor: Prof.dr. K.H. Kuijken, Co-Promotor: Dr. H.Hoekstra
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Molecules during stellar formation and death
Promotor: Prof.dr. E. F. van Dishoeck, Co-promotor: A. N. Heays
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darkness: constraining the nature and properties of dark matter using the stellar kinematics in the centres of ultra-faint dwarf galaxies
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.
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Simon Portegies Zwart
Science
spz@strw.leidenuniv.nl | +31 71 527 8429
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ALMA Reveals Inner Web of Stellar Nursery
Recent study led at the Leiden Observatory has observed Orion with unprecedented detail. New data from the Atacama Large Millimeter/submillimeter Array (ALMA) and other telescopes have been used to create this stunning image showing a web of filaments in the Orion Nebula. These features appear red-hot…
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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…
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Sjoerd Huisman
Faculteit der Sociale Wetenschappen
s.m.h.huisman@fsw.leidenuniv.nl | +31 71 527 5374
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Resolving the building blocks of galaxies in space and time
We investigate the buildup of galaxies from various vantage points. The first two chapters focus on the stellar content of galaxies, especially the distribution of stellar masses at birth and potential variations therein in various galactic environments.
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Award for finding the most extreme stellar object in the Universe
Joseph Callingham from the Leiden Observatory receives the Louise Webster Prize for outstanding post-doctoral research. The prize is awarded by the Astronomical Society of Australia for Callingham’s search for the most extreme object in the Universe.
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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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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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Simulating the birth environment of circumstellar discs
Circumstellar discs are the reservoirs of gas and dust that surround young stars and have the potential to become planetary systems.
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The interplay between stars, gas and dust in faint star-forming galaxies
When observing star-forming galaxies, we are not only seeing stellar light, but we also see how this interacts with galactic gas and dust. This thesis contains studies of the stellar, nebular and dust properties of low mass star-forming galaxies.
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Ana Parrón Cabañero
Faculteit der Sociale Wetenschappen
a.parron.cabanero@umail.leidenuniv.nl | +31 71 527 2727
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Ludo Waltman
Faculteit der Sociale Wetenschappen
waltmanlr@cwts.leidenuniv.nl | +31 71 527 5806
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The Great Collapse
Promotor: Prof.dr. S.F. Portegies Zwart
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Surveying young stars with Gaia: Orion and the Solar neighbourhood
OB associations are loose groups of young, massive stars. They constitute the last stage of the massive starformation process, and the context in which new stars are formed.
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Turtles all the way down: multiscale simulations connecting star and planet formation
The formation of stars and planets happens over multiple scales, which can interact. In particular, planet formation happens in the dense, complex environment of star forming regions.
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Chaotic dynamics in N-body systems
Promotor: Prof.dr. S.F. Portegies Zwart, Co-promotor: D.C. Heggie
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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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Diagnostics for mechanical heating in star-forming galaxies
Promotor: F.P. Israel, Co-Promoter: R. Meijerink
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Exploring the interactions of M dwarf winds and cosmic rays
This thesis focus on the interaction between M dwarf stellar winds and Galactic cosmic rays and the possible effects on the habitability of exoplanets.
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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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The assembly history of the milky way nuclear star cluster
Promotor: P. T. de Zeeuw, Co-promotor: N. Neumayer; G. van de Ven
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Sanne Kellij
Faculteit der Sociale Wetenschappen
s.kellij@fsw.leidenuniv.nl | +31 71 527 2727
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Hunting for the fastest stars in the Milky Way
The high velocity tail of the total velocity distribution of stars provides essential insight into fundamental properties of the Galaxy.
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Tuning in to star-planet interactions at radio wavelengths
Low-mass main-sequence stars like our Sun are continuous sources of outflowing hot magnetised plasma. In the case of the Sun, this is known as the solar wind, whereas for other stars they are called stellar winds.
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Discover More HyperVelocity Stars to shed light on the Galaxy
Rossi
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Shaping Massive Galaxies: the structural evolution of galaxies across
Galaxies in the local Universe fall into two main categories of spirals and ellipticals. In this Thesis, we explore the structural evolution of galaxies into this bimodal distribution.
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Simone Dobbelaar
Faculteit der Sociale Wetenschappen
s.dobbelaar@fsw.leidenuniv.nl | +31 71 527 2727
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Juan Claramunt Gonzalez
Faculteit der Sociale Wetenschappen
j.claramunt.gonzalez@fsw.leidenuniv.nl | +31 71 527 6026
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Linda van Leijenhorst
Faculteit der Sociale Wetenschappen
lleijenhorst@fsw.leidenuniv.nl | +31 71 527 3750
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Janna Marie Bas-Hoogendam
Faculteit der Sociale Wetenschappen
j.m.hoogendam@fsw.leidenuniv.nl | +31 71 527 6345
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Nikki Nibbering
Faculteit der Sociale Wetenschappen
n.nibbering@fsw.leidenuniv.nl | +31 71 527 2727
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Chris Verhoeven
Faculteit der Sociale Wetenschappen
verhoeven@fsw.leidenuniv.nl | +31 71 527 4069
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Judith Schomaker
Faculteit der Sociale Wetenschappen
j.schomaker@fsw.leidenuniv.nl | +31 71 527 2727
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Aleksandrina Skvortsova
Faculteit der Sociale Wetenschappen
a.skvortsova@fsw.leidenuniv.nl | +31 71 527 2727
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Robert-jan de Rooij
Faculteit der Sociale Wetenschappen
r.j.b.de.rooij@fsw.leidenuniv.nl | +31 71 527 2727
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Exo-planets, star and planet formation
At Leiden Observatory, researchers investigate the origin of stars and their planetary systems. They detect and characterize planets around other stars, which are called exo-planets. They study how stars and planets form. And they follow molecules from interstellar clouds to nascent planet systems.…
- Leiden Observatory
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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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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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Repair a bad kidney or make a new one to order
Searching for ways to delay the need for a transplant and trying to build kidneys to order.
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The hunt for frozen organic molecules in space
Complex Organic Molecules (COMs) have been detected in objects across different stages of stellar evolution.