Speaker
Description
We use surface brightness and velocity dispersion data to constrain the parameters of the luminous and dark matter densities for a sample of 10 Milky Way, dwarf spheroidal galaxies (MW dSphs). We model the luminous matter density with a generalized Plummer profile, of inner slope $\gamma_*$, and the dark matter (DM) density with a Zhao-type model, of inner slope $\gamma$. The specific DM density model we use has the advantage of an analytic mass integral, facilitating particularly simple DM density and mass profile fits for any $0 \leq \gamma \leq 1$. We find that the best-fit values of $\gamma_*$ and $\gamma$ are correlated with each other, as well as with other parameters, such as the effective radii, $R_{\rm eff}$, and the stellar-to-total mass ratios of the dSphs in our sample. Additionally, we find that the best-fit DM scale radii and scale density parameters are also correlated with $R_{\rm eff}$.
| References | For instance, Walker, et al. (2009): arXiv:0906.0341; 2009ApJ.704.1274W and Donato, et al. (2009): arXiv:0904.4054; MNRAS.397.1169D, which each have hundreds of more recent citations, introduce similar relations to which I will compare my results. |
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