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Peculiarities in the stellar velocity distribution of galaxies with a two-armed spiral structure
E. I. Vorobyov, Christian Theis
We expand our pervious numerical study of the properties of the stellar velocity distribution within the disk of a two-armed spiral galaxy by considering spiral stellar density wav…
On the Dynamics of Inclined Neptune's Trojans
Li-Yong Zhou, Rudolf Dvorak, Yi-Sui Sun
The dynamics of artificial asteroids on the Trojan-like orbits around Neptune is investigated in this paper. We describe the dependence of the orbital stability on the initial semi…
Far-infrared spectra of hydrous silicates at low temperatures - Providing laboratory data for Herschel and ALMA
H. Mutschke, S. Zeidler, Th. Posch +3
Hydrous silicates occur in various cosmic environments, and are among the minerals with the most pronounced bands in the far infrared (FIR) spectral region. Given that Herschel and…
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…