John Carr CPPM, Marseille 1/20 The New Gamma Ray Observatory: CTA, - PowerPoint PPT Presentation

The New Gamma Ray Observatory: CTA John Carr CPPM, Marseille 1/20 The New Gamma Ray Observatory: CTA, J. Carr FFP14, July 2014

CTA Project � A huge improvement in all aspects of performance � A factor ~10 in sensitivity, much wider energy coverage, much better resolution, field-of-view, full sky, … � A user facility / proposal-driven observatory � With two sites with a total of >100 telescopes � A 27 nation ~€200M project � Including everyone from HESS, MAGIC and VERITAS Operation for 30 years

Detection Method Detection Method Electromagnetic cascade γ -ray enters the atmosphere 10 nanosecond snapshot 0.1 km 2 “light pool”, a few photons per m 2 . ~ 120 m

Energy range of different telescopes The New Gamma Ray Observatory: CTA, J. Carr 4/20 FFP14, July 2014

-11 10 Fermi 1 year E × F(>E) (TeV/cm 2 s) HESS Sensitivity: -12 10 50 hours -13 10 CTA --14 10 0.01 0.1 1 10 100 Energy (TeV) SST MST LST

CTA MST Prototype in Berlin

Sites: Candidates Arizona (2) Tenerife ● Many good sites � Extensive studies taken place ● Decisions during 2014 � First ranking of site in Southern Hemisphere. SPM - Mexico Aar/HESS Namibia � Site negotiations to start soon. � Decision on Northern sites later. ● Site development 2017 ● First telescopes operating on site in 2017 Argentina (2) Chile - Armazones The New Gamma Ray Observatory: CTA, J. Carr FFP14, July 2014 7/20

CTA Schedule Reviews: Aiming for project approval mid-2015 FFP14, July 2014 The New Gamma Ray Observatory: CTA, J. Carr 8/20

CTA Science ● Cosmic Particle Acceleration, Propagation and Impact � Mechanisms for particle acceleration, galactic CR acceleration and Pevatrons, acceleration in jets and lobes of AGN, cosmic ray transport, … � What role do accelerated particles play in feedback on star formation and galaxy evolution? ● Probing Extreme Environments � Neutron stars and black holes, relativistic jets, winds and explosions, the contents of cosmic voids, … ● Physics Frontiers � What is the nature of Dark Matter? How is it distributed? � Is the speed of light a constant for high-energy photons? � Do axion-like particles exist?

CTA Reach Current Galactic VHE sources (with distance estimates) ● Galactic objects HESS � Newly born pulsars and the supernova remnants › have typical brightness such that HESS etc can see only relatively local (typically at a few kpc) objects � CTA will see whole Galaxy ● Field of view + sens. CTA � Survey speed ~300 × HESS 5 ° 8 °

CTA Resolution 10 Arcminutes Requirement CTA Goal 1

The Galactic Centre ● CTA resolution+sensitivity can disentangle emission HESS PSF SNR G0.9+0.1 Sgr A* Sgr B2 CTA PSF NRAO: 20cm, 1.1mm, 5 µm HESS

Indirect Searches for Dark Matter FFP14, July 2014 The New Gamma Ray Observatory: CTA, J. Carr 13/20

Targets for IDM Searches FFP14, July 2014 The New Gamma Ray Observatory: CTA, J. Carr 14/20

Comparison of targets FFP14, July 2014 The New Gamma Ray Observatory: CTA, J. Carr 15/20

Sensitivity from some targets CTA Array B ( 5 LST) CTA prediction One dwarf galaxy CTA prediction FERMI Galactic Halo result 10 dwarf galaxies The New Gamma Ray Observatory: CTA, J. Carr 16/20 FFP14, July 2014

Existing limits from indirect gamma “thermal” annihilation cross-section Fermi has best limits up to ~ 500 GeV mass The New Gamma Ray Observatory: CTA, J. Carr 17/20 FFP14, July 2014

126 GeV Higgs is strong constraint on SUSY DM Excl. by LEP A. Pomarol weakly-coupled models SUSY parameter space allowed by LHC SM (valid up to M P ) { MSSM strongly-coupled models Composite PGB Higgs { Higgsless 200 GeV 50 100 150 Higgs mass 1 loop correction to Higgs mass The New Gamma Ray Observatory: CTA, J. Carr 18/20 FFP14, July 2014

CTA Prospects for Dark Matter Discovery Roszkowski et al., arXiv:1405.4289 In both CMSSM and NUHM, most models in range between 3 10 -27 and 3 10 -26 FFP14, July 2014 The New Gamma Ray Observatory: CTA, J. Carr 19/20

Summary � CTA expected to start science in 2017 � Factor 10 improvements on existing facilities � Great possibility to discovery dark matter � And very many other science opportunities FFP14, July 2014 The New Gamma Ray Observatory: CTA, J. Carr 20/20