The Faculty of Mathematics and Natural Sciences: Search
Now showing items 11-20 of 65
High-energy processes in low-mass protostars – an X-ray to radio multi-wavelength perspective
(2007)
High-energy processes in protostars remain poorly understood. Only after the recently finished Chandra Orion Ultra-deep Project (COUP), statistically significant information on X-ray emission from Young Stellar Objects ...
From star formation to regional distribution: Influences on the embedded cluster mass function
(2021-07-02)
In this work we study the embedded cluster mass function (ECMF), meaning the mass distribution
function of embedded clusters. Embedded clusters are fully or partially enclosed in interstellar gas,
dust and molecular ...
Die Suche nach hochdispergierten Radio-Pulsaren in Richtung des Galaktischen Zentrums
(2005)
Obwohl bis zum heutigen Tage mehr als 1500 Radio-Pulsare in unserer Galaxie entdeckt wurden, konnte bislang nicht ein einziger Pulsar im direkten Umfeld des Galaktischen Zentrums gefunden werden. Dies ist um so mehr ...
Weak Gravitational Lensing and Galaxy Bias
(2005)
Galaxies were formed from primordial baryonic matter within the gravitational potential of the dark matter. Today a confusing wealth of different galaxy populations is known. Explaining the emergence of this zoo of galaxy ...
X-rays from Irregular Dwarf Galaxies: The Connection between Coronal Gas and High Energetic Stellar Events
(2005)
Radio observations of irregular dwarf galaxies (dIrr) in the 21 cm-line emission reveal cavities in their interstellar medium which are denoted as holes, bubbles or shells. The origin of these structures is still a matter ...
Pyrolyse von Metalloxiden und Silikaten unter Vakuum mit konzentrierter Solarstrahlung
(2005)
In der vorliegenden Arbeit wurde untersucht, ob eine solarthermische Hochtemperaturpyrolyse von Mondgestein oder anderen Gesteinen im Vakuum zur Gewinnung von Sauerstoff prinzipiell möglich ist und welche Anforderungen ...
Investigations of Intraday Variable Blazar Cores and the Connected Interstellar Medium
(2006)
The work presented here is an attempt to shed further light upon the phenomenon of short-term radio variations (Intraday Variability, IDV) often observed in compact blazar cores. Three different new observational approaches ...
Modellierung der dreidimensionalen Dichteverteilung des geokoronalen Neutralwasserstoffes auf Basis von TWINS Ly-Alpha-Intensitätsmessungen
(2006)
Die dreidimensionale Dichteverteilung des geokoronalen Neutralwasserstoffes der äußeren Exosphäre der Erde sowie deren zeitliche Dynamik sind nach wie vor Gegenstand der Hochatmosphärenforschung. Insbesondere die verschiedenen ...
Radio Emission from Cosmic Ray Air Showers
(2005)
Charged particles with energies ranging from a few times 106 eV up to ≥ 1020 eV continuously impinge on the earth as so-called “cosmic rays”. Their study constitutes an important field of research in ...
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 ...