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Shape and orientation of stellar velocity ellipsoids in spiral galaxies
E. I. Vorobyov, Ch. Theis
We present a numerical study of the properties of the stellar velocity distribution in stellar discs which have developed a saturated, two-armed spiral structure. We follow the gro…
GD 99 - an unusual, rarely observed DAV white dwarf
Zs. Bognár, M. Paparó, B. Steininger +1
New observations of GD 99 are analysed. The unusual pulsation behaviour, showing both long and short periods, has been confirmed. All the available periods show a grouping of short…
2D velocity fields of simulated interacting disc galaxies
T. Kronberger, W. Kapferer, S. Schindler +1
We investigate distortions in the velocity fields of disc galaxies and their use to reveal the dynamical state of interacting galaxies at different redshift. For that purpose, we m…
The early evolution of tidal dwarf galaxies
S. Recchi, Ch. Theis, P. Kroupa +1
Context: Dwarf galaxies can arise from self-gravitating structures emerging from tidal tails. What fraction of the known dwarf galaxies in the Local Universe can have this origin i…
Dynamics of a strongly interacting Fermi gas: the radial quadrupole mode
A. Altmeyer, S. Riedl, M. J. Wright +3
We report on measurements of an elementary surface mode in an ultracold, strongly interacting Fermi gas of 6Li atoms. The radial quadrupole mode allows us to probe hydrodynamic beh…