52 citations · 213 across the 31 of their papers we have counts for
4 papers · 1 filter
On the axisymmetric thin disk model of flattened galaxies
Łukasz Bratek, Joanna Jałocha, Marek Kutschera
Non-monotonic features of rotation curves, and also the related gravitational effects typical of thin disks -- like backward-reaction or amplification of rotation by negative surfa…
Is dark matter present in NGC4736? An iterative spectral method for finding mass distribution in spiral galaxies
Joanna Jalocha, Lukasz Bratek, Marek Kutschera
An iterative method for reconstructing mass distribution in spiral galaxies using a thin disk approximation is developed. As an example, the method is applied to galaxy NGC 4736; i…
van Stockum--Bonnor Spacetimes of Rigidly Rotating Dust
Lukasz Bratek, Joanna Jalocha, Marek Kutschera
Stationary, axisymmetric and asymptotically flat spacetimes of dust of which trajectories are integral curves of the time translation Killing vector are investigated. The flow has…
Rotation curves of spiral galaxies: Influence of magnetic fields and energy flows
M. Kutschera, J. Jalocha
Physical mechanisms that can influence rotation curves of spiral galaxies are discussed. For dark matter studies, possible contributions due to magnetic fields and non-Newtonian gr…