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Tests of the Radial Tremaine-Weinberg Method
Sharon E. Meidt, Richard J. Rand, Michael R. Merrifield +2
At the intersection of galactic dynamics, evolution and global structure, issues such as the relation between bars and spirals and the persistence of spiral patterns can be address…
Observable Properties of Double-Barred Galaxies in N-Body Simulations
Juntai Shen, Victor P. Debattista
Although at least one quarter of early-type barred galaxies host secondary stellar bars embedded in their large-scale primary counterparts, the dynamics of such double barred galax…
Towards a Solution for the Ca II Triplet Puzzle : Results from Dwarf Elliptical Galaxies
Dolf Michielsen, Mina Koleva, Philippe Prugniel +6
We present new estimates of ages and metallicities, based on FORS/VLT optical (4400-5500A) spectroscopy, of 16 dwarf elliptical galaxies (dE's) in the Fornax Cluster and in Souther…
Beyond Inside-Out Growth: Formation and Evolution of Disk Outskirts
Rok Roškar, Victor P. Debattista, Gregory S. Stinson +3
We have performed a high mass and force resolution simulation of an idealized galaxy forming from dissipational collapse of gas embedded in a spherical dark matter halo. The simula…
The Causes of Halo Shape Changes Induced by Cooling Baryons: Disks Versus Substructures
Victor P. Debattista, Ben Moore, Thomas Quinn +5
Cold dark matter cosmogony predicts triaxial dark matter halos, whereas observations find quite round halos. This is most likely due to the condensation of baryons leading to round…
Proper Motion Dispersions of Red Clump Giants in the Galactic Bulge: Observations and Model Comparisons
Nicholas J. Rattenbury, Shude Mao, Victor P. Debattista +3
Red clump giants in the Galactic bulge are approximate standard candles and hence they can be used as distance indicators. We compute the proper motion dispersions of RCG stars in…