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Re‐examination of the Population, Stratigraphy, and Sequence of Mercurian Basins: Implications for Mercury's Early Impact History and Comparison With the Moon
(
- Journal of Geophysical Research: Planets
, 2020-08-11)
Mercury has one of the best‐preserved impact records in the inner solar system due to the absence of an atmosphere and relatively unmodified ancient surface. However, our knowledge of the early impact record and the nature ...
WRF‐based dynamical downscaling of ERA5 reanalysis data for High Mountain Asia: Towards a new version of the High Asia Refined analysis
(
- International Journal of Climatology
, 2020-06-18)
The High Asia Refined analysis (HAR) is a regional atmospheric data set generated by dynamical downscaling of the Final operational global analysis (FNL) using the Weather Research and Forecasting (WRF) model. It has been ...
Nanoscale Imaging of High‐Field Magnetic Hysteresis in Meteoritic Metal Using X‐Ray Holography
(
- Geochemistry, Geophysics, Geosystems
, 2020-08-03)
Stable paleomagnetic information in meteoritic metal is carried by the “cloudy zone”: ~1–10 μm‐wide regions containing islands of ferromagnetic tetrataenite embedded in a paramagnetic antitaenite matrix. Due to their small ...
The metagalactic UV background at z < 3
(Univ. Hamburg, 2005)
The high ionization state of the intergalactic medium (IGM) is maintained by the metagalactic UV background radiation. This ionizing radiation field is supposed to be the integrated radiation of quasars and young star-forming ...
Chromospheric and coronal activity
(Univ. Hamburg, 2005)
Unter stellarer Aktivität werden eine Reihe von Phänomenen in den unterschiedlichen Atmosphärenschichten zusammengefasst, die eng mit dem Magnetfeld des einzelnen Sterns verbunden sind. Da eine direkte Auflösung der ...
Development of ultrathin niobium nitride and niobium titanium nitride films for THz hot-electron bolometers
(Univ. Köln, 2005)
The main focus of this work is the development of ultrathin NbN and NbTiN films. A reproducible and reliable deposition process for ultrathin NbN and NbTiN films for the use in phonon-cooled HEB devices was established. ...
Aktivitätskoeffizienten von Si und Cr in Fe-Ni-Legierungen und ihre Relevanz für die Thermodynamik planetarer Differentiationsprozesse
(Univ. Köln, 2005)
Die Erde und viele andere planetare Körper besitzen Eisennickel-Kerne. Diese resultieren aus einer zumindest partiellen Aufschmelzung in der Frühphase ihrer Geschichte. Durch die Gravitation hat sich dabei das schwerere ...
Waveguide heterodyne mixers at THz-frequencies
(Univ. Köln, 2007)
Design and performance of waveguide mixers at 1.4 THz and 1.9 THz based on NbTiN phonon-cooled hot electron bolometers (HEB) fabricated on a 2 æm thick Si_3N_4 membrane. The membrane is bonded to a silicon frame in the ...
High-resolution observations of the solar photosphere and chromosphere
(Univ. Freiburg (Breisgau), 2007)
Observations of the sun are almost always impaired by the turbulent motion of air in Earth's atmosphere. The turbulence would limit the theoretical resolution of modern large telescopes to that of amateur telescopes without ...
A Synoptic‐Scale Wavelike Structure in the Nighttime Equatorial Ionization Anomaly
(
- Earth and Space Science
, 2021-02-17)
Both ground‐ and satellite‐based airglow imaging have significantly contributed to understanding the low‐latitude ionosphere, especially the morphology and dynamics of the equatorial ionization anomaly (EIA). The NASA ...