28 citations · 62 across the 5 of their papers we have counts for
6 papers · 1 filter
Bar-driven Leading Spiral Arms in a Counter-rotating Dark Matter Halo
Emma Lieb, Angela Collier, Ann-Marie Madigan
An overwhelming majority of galactic spiral arms trail with respect to the rotation of the galaxy, though a small sample of leading spiral arms has been observed. The formation of…
Central Dynamics of Multi-mass Rotating Star Clusters
Maria Tiongco, Angela Collier, Anna Lisa Varri
We investigate the evolutionary nexus between the morphology and internal kinematics of the central regions of collisional, rotating, multi-mass stellar systems, with special atten…
The Coupling of Galactic Dark Matter Halos with Stellar Bars
Angela Collier, Ann-Marie Madigan
Resonant torques couple stellar bars to dark matter halos. Here we use high-resolution numerical simulations to demonstrate long-term angular momentum transfer between stellar bars…
Violent Buckling Benefits Galactic Bars
Angela Collier
Galactic bars are unstable to a vertical buckling instability which heats the disk and in some cases forms a boxy/peanut shaped bulge. We analyze the buckling instability as an app…
Stellar Bars in Counter-Rotating Dark Matter Halos: The Role of Halo Orbit Reversals
Angela Collier, Isaac Shlosman, Clayton Heller
Disk galaxies can exchange angular momentum and baryons with their host dark matter (DM) halos. These halos possess internal spin, `lambda', which is insignificant rotationally but…
Dark Matter Bars in Spinning Halos
Angela Collier, Isaac Shlosman, Clayton Heller
We study nonlinear response of spinning dark matter (DM) halos to dynamic and secular evolution of stellar bars in the embedded galactic disks, using high-resolution numerical simu…