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

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

Feb 01, 2023 143 likes •351 views

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

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The New Gamma Ray Observatory: CTA

FFP14, July 2014 The New Gamma Ray Observatory: CTA, J. Carr

John Carr CPPM, Marseille

1/20

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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

CTA Project

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~ 120 m γ-ray enters the atmosphere

Electromagnetic cascade

10 nanosecond snapshot 0.1 km2 “light pool”, a few photons per m2.

Detection Method Detection Method

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The New Gamma Ray Observatory: CTA, J. Carr

Energy range of different telescopes

4/20 FFP14, July 2014

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100

Fermi HESS

10

  • 13

10

  • 12

Sensitivity: E × F(>E) (TeV/cm2s)

CTA

1 year 50 hours 10

  • 11

Energy (TeV)

0.01 0.1 10

  • -14

1 10

LST MST SST

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CTA MST Prototype in Berlin

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The New Gamma Ray Observatory: CTA, J. Carr

Sites: Candidates

Tenerife SPM - Mexico Arizona (2) Aar/HESS Namibia Argentina (2) Chile - Armazones

  • Many good sites

Extensive studies taken place

  • Decisions during 2014

First ranking of site in Southern Hemisphere. Site negotiations to start soon. Decision on Northern sites later.

  • Site development 2017
  • First telescopes operating on site in 2017

FFP14, July 2014 7/20

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CTA Schedule

FFP14, July 2014 The New Gamma Ray Observatory: CTA, J. Carr 8/20

Reviews:

Aiming for project approval mid-2015

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CTA Science

  • Cosmic Particle Acceleration, Propagation

and Impact

Mechanisms for particle acceleration, galactic CR

acceleration and Pevatrons, acceleration in jets and lobes

  • f 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?

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CTA

Current Galactic VHE sources (with distance estimates)

  • Galactic objects

Newly born pulsars and

the supernova remnants

› have typical brightness such that HESS etc can see only relatively local (typically at a few kpc)

  • bjects

CTA will see whole Galaxy

  • Field of view + sens.

Survey speed ~300×HESS

HESS

CTA Reach

5° 8°

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CTA Resolution

Arcminutes 1 10

CTA

Requirement Goal

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The Galactic Centre

  • CTA resolution+sensitivity can disentangle emission

HESS SNR G0.9+0.1 Sgr B2 Sgr A* NRAO: 20cm, 1.1mm, 5 µm CTA PSF HESS PSF

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The New Gamma Ray Observatory: CTA, J. Carr

Indirect Searches for Dark Matter

FFP14, July 2014 13/20

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The New Gamma Ray Observatory: CTA, J. Carr

Targets for IDM Searches

FFP14, July 2014 14/20

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The New Gamma Ray Observatory: CTA, J. Carr

Comparison of targets

FFP14, July 2014 15/20

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The New Gamma Ray Observatory: CTA, J. Carr 16/20 FFP14, July 2014

Sensitivity from some targets

CTA Array B ( 5 LST)

CTA prediction Galactic Halo CTA prediction One dwarf galaxy FERMI result 10 dwarf galaxies

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The New Gamma Ray Observatory: CTA, J. Carr

Existing limits from indirect gamma

17/20 FFP14, July 2014

Fermi has best limits up to ~500 GeV mass

“thermal” annihilation cross-section

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The New Gamma Ray Observatory: CTA, J. Carr

126 GeV Higgs is strong constraint on SUSY DM

18/20 FFP14, July 2014 Higgs mass MSSM SM (valid up to MP) Composite PGB Higgs

50 100 150 200 GeV

Higgsless

{

weakly-coupled models strongly-coupled models

{

  • Excl. by LEP
  • A. Pomarol

1 loop correction to Higgs mass

SUSY parameter space allowed by LHC

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CTA Prospects for Dark Matter Discovery

FFP14, July 2014 The New Gamma Ray Observatory: CTA, J. Carr 19/20

In both CMSSM and NUHM, most models in range between 3 10-27 and 3 10-26

Roszkowski et al., arXiv:1405.4289

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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