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Astrophysical phenomena related to supermassive black holes
(Univ. Köln, 2006)
All projects aim at pushing the limits of our knowledge about the interaction between a galaxy and a supermassive black hole (SMBH) at its center. The development of a new instrument can be as valuable as combining different ...
Geographic object based image analysis
(Univ. Freiberg (Sachsen), 2009)
The field of earth observation (EO) has seen tremendous development over recent time owing to the increasing quality of the sensor technology and the increasing number of operational satellites launched by several space ...
Energetic ion composition and acceleration mechanisms in the magnetosphere of Jupiter
(Univ. Zugl.: Braunschweig, 2006)
Based on the first 15 orbits of the Galileo spacecraft the composition of the energetic ion population of the Jovian magnetosphere has been studied for the first time on a global scale. More specific, three different types ...
Multistatic Specular Meteor Radar Network in Peru: System Description and Initial Results
(
- Earth and Space Science
, 2021-01-13)
The mesosphere and lower thermosphere (MLT) region is dominated globally by dynamics at various scales: planetary waves, tides, gravity waves, and stratified turbulence. The latter two can coexist and be significant at ...
Supernova remnants in nearby galaxies
(
- Astronomische Nachrichten
, 2020)
Supernova remnants (SNRs) are the aftermath of stellar explosions, which inject large amounts of energy into the interstellar medium (ISM), carving out new structures and transferring kinetic energy to the ISM. They also ...
Low-Frequency Seismicity at Villarrica Volcano: Source Location and Seismic Velocities
(
- Journal of Geophysical Research: Solid Earth
, 2019)
Villarrica Volcano (Chile) is one of the most active volcanoes in South America. Its low-frequency (≤5 Hz) seismicity consists of a continuous tremor, overlain by impulsive transient events of higher amplitude in 60-s ...
The three-dimensional topology of magnetic fields in and around sunspots
(Univ. Freiburg (Breisgau), 2006)
The most prominent features on the surface of the solar disc are the sunspots, which have been studied since their detection in the 17th century. Despite this years and centuries of scientific investigations, surprisingly ...
Photonische Lokaloszillatoren für Anwendungen in der Terahertz-Radioastronomie
(Univ. Duisburg, 2006)
Photonic Local Oscillators (PLOs) operating at optical wavelengths around 1550 nm have a major importance especially for radio astronomic THz Antenna arrays like the "Atacama Large Millimeter/Submillimeter Array" (ALMA) ...
High resolution spectroscopy of photospheric bright points
(Univ. Freiburg (Breisgau), 2006)
Photospheric bright points are proxies for small-scale magnetic flux concentrations.These magnetic elements are thought to be the building blocks of the solar magnetic field and are important to understand many physical ...
Degradation of Small Simple and Large Complex Lunar Craters: Not a Simple Scale Dependence
(
- Journal of Geophysical Research: Planets
, 2020-04-20)
The crater record of a planetary surface unit is often analyzed by its cumulative size‐frequency distribution (CSFD). Measuring CSFDs involves traditional approaches, such as traditional crater counting (TCC) and buffered ...