Conveners
Galaxy: dynamics & archaeology
- Alessandro Sonnenfeld
Simulated galaxies and their dark matter (DM) halos are resolved by fewer particles than there are stars and DM particles in real galaxies and, as a result, are subject to spurious evolution due to gravitational scattering. I will present results from a suite of idealized simulations designed to study the effect of spurious collisional heating on the kinematics and morphologies of simulated...
Deriving galaxies’ past merger history is challenging, albeit possible with their 3D internal chemical-dynamical structures illustrated by the MW with resolved single stars. Modern IFU spectrographs offer the ability to map the spatial distribution of the motions, ages, and chemical abundances of stars for many nearby galaxies. But the information is still blended along the line-of-sight. To...
We employ a recently-developed population-orbit superposition technique to simultaneously fit the stellar kinematic and age maps of 82 CALIFA spiral galaxies, and obtain the ages of stars in different dynamical structures. We first evaluate the capabilities of this method on CALIFA-like mock data created from the Auriga simulations. The recovered mean ages of dynamically cold, warm and hot...
Dark matter content within a few Re of galaxies can provide important test of hydrodynamical cosmological simulations, but we are still lacking of reliable measurements of dark matter content in a large number of galaxies across the Hubble types. IFU surveys have provide stellar kinematics for thousands of nearby galaxies, but they usually only cover the inner 1-2Re of galaxies. To strongly...
