Results 81 to 90 of about 16,167 (173)

The Allure of High Total Angular Momentum Levels in Multiply-Excited Ions

Atoms, 2019
In the interaction of fast ions with dense matter, the collision frequency is high enough to facilitate the simultaneous excitation of several electrons.
Elmar Träbert
doaj   +1 more source

Photospheric Magnetic Fields of the Trailing Sunspots in Active Region NOAA 12396

, 2018
The solar magnetic field is responsible for all aspects of solar activity. Sunspots are the main manifestation of the ensuing solar activity. Combining high-resolution and synoptic observations has the ambition to provide a comprehensive description of ...
Balthasar, H., Berkefeld, T., Böhm, F., Collados, M., Denker, C., Diercke, A., Feller, A., Fischer, C. E., González, N. Bello, Hofmann, A., Kuckein, C., Lagg, A., Manrique, S. J. González, Nicklas, H., Rezaei, R., Schlichenmaier, R., Schmidt, D., Schmidt, W., Sigwarth, M., Sobotka, M., Solanki, S. K., Soltau, D., Staude, J., Strassmeier, K. G., Suárez, D. Orozco, Verma, M., Volkmer, R., von der Lühe, O., Waldmann, T., Yabar, A. Pastor   +29 more
core  

The influence of x-ray pulse length on space-charge effects in optical pump/x-ray probe photoemission

New Journal of Physics, 2019
Pump-probe photoelectron spectroscopy (PES) is a versatile tool to investigate the dynamics of transient states of excited matter. Vacuum space-charge effects can mask these dynamics and complicate the interpretation of electron spectra.
Danilo Kühn, Erika Giangrisostomi, Raphael M Jay, Florian Sorgenfrei, Alexander Föhlisch   +4 more
doaj   +1 more source

Spectral evolution of hot hybrid white dwarfs

Astronomy & Astrophysics
We present a photometric analysis of 19 DA and 13 DAO white dwarfs (WDs) with effective temperatures exceeding 60 000 K, building on the spectral analysis reported in the first paper of this two-part study. By examining archival light curves for periodic
Filiz Semih, Reindl Nicole, Jones David, Sowicka Paulina, Dorsch Matti, Rauch Thomas, Werner Klaus   +6 more
doaj   +1 more source

FlashCam: a fully-digital camera for the medium-sized telescopes of the Cherenkov Telescope Array

, 2015
The FlashCam group is currently preparing photomultiplier-tube based cameras proposed for the medium-sized telescopes (MST) of the Cherenkov Telescope Array (CTA).
Bauer, C., Bernhard, S., Capasso, M., Diebold, S., Eisenkolb, F., Florin, D., Funk, S., Föhr, C., Gadola, A., Garrecht, F., Hermann, G., Jung, I., Kalekin, O., Kalkuhl, C., Kasperek, J., Kihm, T., Lahmann, R., Manalaysay, A., Marszalek, A., Pfeifer, M., Pühlhofer, G., Rajda, P. J., Reimer, O., Santangelo, A., Schanz, T., Schwab, T., Steiner, S., Straumann, U., Tenzer, C., Vollhardt, A., Weitzel, Q., Werner, F., Wolf, D., Zietara, K.   +33 more
core  

Towards a fundamental astrometric reference system behind the Malleganic clouds : spectroscopic confirmation of new quasar candidates selected in the near-infrared [PDF]

, 2016
Quasi-stellar objects (quasars) located behind nearby galaxies provide an excellent absolute reference system for astrometric studies, but they are difficult to identify because of fore- and background contamination.
Bekki, Kenji, Cioni, Maria-Rosa Lucia, De Grijs, Richard, Emerson, Jim, For, Bi-Qing, Gibson, Brad K., Ivanov, Valentin D., Kamath, Devika, Piatti, Andrés, Van Loon, Jacco Th   +9 more
core   +1 more source

Buried-stressor technology for the epitaxial growth and device integration of site-controlled quantum dots

Materials for Quantum Technology
Semiconductor quantum dots (QDs) are high-quality nanocrystals that provide three-dimensional carrier confinement on the scale of the de Broglie wavelength.
Kartik Gaur, Priyabrata Mudi, Petr Klenovsky, Stephan Reitzenstein   +3 more
doaj   +1 more source

Cold DUst around NEarby Stars (DUNES). First results: A resolved exo-Kuiper belt around the solar-like star ζ^2 Ret [PDF]

, 2010
We present the first far-IR observations of the solar-type stars δ Pav, HR 8501, 51 Peg and ζ^2 Ret, taken within the context of the DUNES Herschel open time key programme (OTKP).
Ardila, D., Beichman, C., Eiroa, C.
core  

Mode Composition Shapes Magnetic Anisotropy in Solar Wind Turbulence

The Astrophysical Journal
Turbulence is a ubiquitous process that transfers energy across many spatial and temporal scales, thereby influencing particle transport and heating. Recent progress has improved our understanding of the anisotropy of turbulence with respect to the mean ...
Siqi Zhao, Huirong Yan, Terry Z. Liu, Chuanpeng Hou   +3 more
doaj   +1 more source

Grenzgebiet und Teamarbeit [PDF]

, 1964
Schraub, Alfred
core   +1 more source