97 citations · 724 across the 53 of their papers we have counts for
19 papers · 1 filter
Metal-Poor Stars in the MW Disk: Resonant Cooling of Vertical Oscillations of Halo Stars in Barred Galaxies
Xingchen Li, Isaac Shlosman, Daniel Pfenniger +1
Using numerical simulations of barred disk galaxy embedded in nonspinning and spinning dark matter (DM) halos, we present a novel mechanism of `cooling' the vertical oscillations o…
Evolution of Stellar Bars in Spinning Dark Matter Halos and Stellar Bulges
Xingchen Li, Isaac Shlosman, Daniel Pfenniger +1
We use high-resolution numerical simulations to follow the barred disk evolution in a suite of models with progressively more massive stellar bulges, with bulge-to-total (diskbu…
Five methods for determining pattern speeds in galaxies
Daniel Pfenniger, Kanak Saha, Yu-Ting Wu
Aims. New or refined methods for determining instantaneous scalar and vector pattern speeds from a restricted domain are developed, for applications in N-body simulations or in gal…
Stellar Bars in Spinning Halos: Delayed Buckling and Absence of Slowdown
Xingchen Li, Isaac Shlosman, Clayton Heller +1
We use high resolution numerical simulations in order to analyze the stellar bar evolution in spinning dark matter (DM) halos. Previous works have shown that the halo spin has a su…
The Origin of Buckling Instability in Galactic Bars: Searching for the Scapegoat
Xingchen Li, Isaac Shlosman, Daniel Pfenniger +1
The buckling process in stellar bars is full of unsolved issues. We analyze the origin of the buckling instability in stellar bars using high-resolution N-body simulations. Previou…
Angular momentum bounds in particle systems
Daniel Pfenniger
Four expressions involving sums of position and velocity coordinates bounding the total angular momentum of particle systems, and by extension of any continuous or discontinuous ma…