E-Dissertationen: Suche
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Molecular line emission in asymmetric envelopes of evolved stars
(2014-07-03)
Stars with initial masses of 0.8 < M⋆ < 9M⊙ eject most of their mass when evolving along the asymptotic giant branch (AGB) phase. The ejected material eventually cools down, which leads it to condensate ...
A Unified Formation Scenario for the Zoo of Extended Star Clusters and Ultra-Compact Dwarf Galaxies
(2014-07-18)
In the last decade, very extended old stellar clusters, which cover a large mass range, have been found in various types of galaxies in different environments. Objects with masses comparable to normal globular clusters ...
Young stellar clusters throughout the Galaxy and the interaction with their molecular environment
(2014-02-28)
Stars are born within dense clumps of giant molecular clouds, constituting young stellar agglomerates known as embedded clusters. Once the parental gas is expelled through stellar feedback, they evolve into bound open ...
Shocks in the interstellar medium
(2014-01-09)
Shocks are ubiquitous in the interstellar medium (ISM), occurring whenever large pressure gradients lead to fluid-dynamical disturbances that move at a velocity that exceeds the local sound speed. As shocks dissipate kinetic ...
Magnetisation of the IGM: Role of Starburst Dwarf Galaxies
(2014-01-30)
Magnetic fields are ubiquitous in the Cosmos. They are observed on all scales -- from our solar system to galaxy clusters millions of light years away. The dynamo theory and the theory of gravitational compression during ...
Molecular Outflows in Star Forming Regions
(2014-05-21)
This thesis work focus on the study of the molecular emission from outflows produced by jets in regions of star formation. After introducing the topic of star formation, and in particular its related outflow process, a ...
The Quintuplet cluster: A young massive cluster study based on proper motion membership
(2014-01-27)
Young massive clusters define the high mass range of current clustered star formation and are frequently found in starburst and interacting galaxies. As - with the exception of the nearest galaxies within the local group ...
Submillimeter Studies of Low-Mass Star Forming Regions
(2014-09-30)
The nearby molecular clouds Chamaeleon I and III (Cha I, Cha III) constitute excellent targets for low-mass star formation studies. Their large starless core population presents the opportunity to explore the earliest ...
Pulsar astrometry with VLBI and beyond
(2014-11-04)
Stars with masses about fifteen times that of the Sun end their lives in core-collapse supernovae. The outcome of the gravitational collapse of the stellar core is a compact object known as a neutron star. Typically, these ...
Weak lensing measurements for the APEX-SZ cluster survey
(2014-12-02)
The formation of structures in the universe, such as galaxy clusters, depends sensitively on cosmological parameters. Measuring the abundance of clusters as a function of mass and redshift therefore yields a way to constrain ...