Speaker
Description
Milky Way dwarf spheroidal galaxies (dSphs) are among the most promising targets for indirect dark matter (DM) searches. A key ingredient in robust predictions of DM annihilation signals is an accurate characterization of the DM profile in these systems.
In this work, we investigate the impact of non-spherical DM halo structures on gamma-ray observations with the Cherenkov Telescope Array Observatory (CTAO). We construct J-factor maps based on non-spherical dynamical models of dSphs and perform a full analysis incorporating CTAO instrumental response using Gammapy. We then derive projected constraints on the DM annihilation cross section.
In this presentation, we discuss the impacts of dSphs morphology on CTAO sensitivity to DM annihilation signals quantitatively, building axisymmetric density profile models based on the recent kinematical data of several targets.
We also assess the uncertainties originates from profile parameters.
Finally, we highlight future prospects enabled by synergy with upcoming spectroscopic data from the Subaru Prime Focus Spectrograph (PFS), which will significantly improve constraints on DM profiles in dSphs.
