1 / 13

Karl Mannheim – ITPA Würzburg

Karl Mannheim – ITPA Würzburg. Gamma rays from the Virgo and Coma clusters of galaxies Berlin CTA-Meeting, May 4-5, 2006. Clusters of Galaxies. Storage of (UHE) cosmic rays Supernova-driven winds Radiojets from Active Galactic Nuclei Acceleration of (UHE) cosmic rays

charles-porter
Télécharger la présentation

Karl Mannheim – ITPA Würzburg

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Karl Mannheim – ITPA Würzburg Gamma rays from the Virgo and Coma clusters of galaxies Berlin CTA-Meeting, May 4-5, 2006

  2. Clusters of Galaxies • Storage of (UHE) cosmic rays • Supernova-driven winds • Radiojets from Active Galactic Nuclei • Acceleration of (UHE) cosmic rays • Cluster merger shocks • Accretion shocks • Dynamical relaxation shocks • Dark matter annihilation • Largest mass concentrations • Small-scale clumps dominance: Sorting in dM/R2 • Galactic Center • Nearest halo clump (unidentified EGRET?) • Nearest rich clusters (Virgo, Coma, Perseus) • Nearest dwarf galaxies (Sagittarius, Draco)

  3. Galactic Vicinity (200 kpc)

  4. Local Group (2 Mpc)

  5. Local Universe (60 Mpc)

  6. Local Universe (300 Mpc)

  7.  Coma cluster Virgo cluster 

  8. Cosmic rays in nearby clusters of galaxies Pfrommer et al.: Cosmic ray propagation model fitted to radio and X-ray observations, employing hydrodynamical code for of intracluster medium (g-ray fluxes > 50 GeV)

  9. Cosmic rays in Coma Völk et al.: Cosmic ray propagation Reimer et al. Cosmic ray propagation Berrington & Dermer: Cluster merger shock

  10. M 87 / Virgo Cluster DarkSusy scan C=40 C=335 • Control astrophysical backgrounds: • AGN in M87 • CRp – interactions • MAGIC observations • have started in May 2005 Targeted observations seem promising with new – generation experiments

  11. M87 SED (ICRC)

  12. Structure Formation • ART Code (A. Klypin et al.) • 3 £ 1014 solar masses; 9 million particles („Virgo Cluster“) • (sub)structure down to 3 £ 107 solar masses: clumps! 2DM ds D. Elsaesser, S. Gottloeber, A. Khalathyan and M. Steinmetz

  13. Summary Clusters are cutting-edge targets for current IACTs Rich potential for astrophysics, cosmology, and particle physics • Origin of UHE cosmic rays • Dark matter annihilation • Role of nonthermal plasma in structure formation … northern location prefered for a dedicated„cluster mission“with future CTAs…

More Related