Getting to the Fundamental Nature of Dark Matter with LSST Alex Drlica-Wagner Wilson Fellow, Fermilab LSST2018 Project & Community Workshop August 16, 2018 #lsst2018 #lsst2018 LSST Project and Community Workshop 2018 • Tucson • August 13 - 17 1 LSST Project and Community Workshop 2018 • Tucson • August 13 - 17
Astrophysical Evidence of Dark Matter Composition of the Universe Larger Observable Universe Dark Matter Large Scale Structure Clusters of Galaxies DARK MATTER DARK ENERGY ORDINARY MATTER Plank Collaboration (2016) Individual Smaller Galaxies #lsst2018 2 LSST Project and Community Workshop 2018 • Tucson • August 13 - 17
The Hunt for Dark Matter e.g., LHC Production Time D SM Direct Detection Time ? e.g., Xenon1T e.g., Fermi-LAT D SM Time Indirect Detection #lsst2018 3 LSST Project and Community Workshop 2018 • Tucson • August 13 - 17
The Hunt for Dark Matter Astrophysics provides the only robust, positive Dark measurement of dark matter. Matter Require Coupling with Standard Model Message box example for short highlighted messages. 4 #lsst2018 4 LSST Project and Community Workshop 2018 • Tucson • August 13 - 17
#lsst2018 5 LSST Project and Community Workshop 2018 • Tucson • August 13 - 17
Visualizing the Dark Matter Parameter Space https://lsstdarkmatter.github.io/dark-matter-graph/ #lsst2018 6 LSST Project and Community Workshop 2018 • Tucson • August 13 - 17
Warm and Self-Interacting Dark Matter - Dark matter self-interaction cross section - Probed by the shape and offset of dark matter halos - Colliding cluster, cluster density profiles, wobbling BCGs, etc. - Thermal dark matter particle mass - Probed by the smallest dark matter structures - Dark matter subhalos: strong lens arc perturbations, stellar stream perturbations #lsst2018 7 LSST Project and Community Workshop 2018 • Tucson • August 13 - 17
Annihilating Dark Matter - Dark matter annihilation cross section - Production of energetic standard model particles in regions of high dark matter density - Physical target is the thermal relic annihilation cross section (i.e., WIMP miracle) - Targets such as dwarf galaxies or clusters of galaxies. All-sky cross correlation with galaxy catalogs or dark matter mass maps. #lsst2018 8 LSST Project and Community Workshop 2018 • Tucson • August 13 - 17
Decaying Dark Matter - Dark matter decay lifetime - Similar to annihilation: energetic standard model particles - Milky Way halo, galaxy clusters, all-sky cross correlation #lsst2018 9 LSST Project and Community Workshop 2018 • Tucson • August 13 - 17
MACHO Dark Matter - MACHO Dark Matter: - Cannot be included in the cosmological baryon budge - Probed through gravitational lensing (mostly) - Extend to higher masses with long baseline and parallax lensing signals - Lower masses with high sampling rate #lsst2018 10 LSST Project and Community Workshop 2018 • Tucson • August 13 - 17
https://lsstdarkmatter.github.io/ #lsst2018 11 LSST Project and Community Workshop 2018 • Tucson • August 13 - 17
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