3 papers
astro-ph.GA2025
Chemical Evolution in Nuclear Stellar Discs
Jennifer K S Friske, Ralph Schönrich
Nuclear Stellar Discs (NSDs) have been observed in the vast majority of barred disc galaxies including the Milky Way. Their intense star formation is sustained by the intense gas i…
astro-ph.GA2025
Redefining for multi-component discs of stars and gas
Kit George, Ralph Schönrich
We point out a fundamental mismatch in the stability parameter for Galactic discs: Toomre's defines the boundary between axisymmetric stability/instability, while simul…
astro-ph.GA2024
Comment on 'a slightly oblate dark matter halo revealed by a retrograde precessing Galactic disk warp' by Huang et al
Walter Dehnen, Ralph Schönrich, Ronald Drimmel +3
Huang et al. (2024) measured the derivative of the phase of the Galactic warp traced by classical Cepheids with respect to their age and interpreted it as th…