期刊
ASTROPARTICLE PHYSICS
卷 43, 期 -, 页码 189-214出版社
ELSEVIER
DOI: 10.1016/j.astropartphys.2012.08.002
关键词
CTA; Dark matter; Dwarf satellite galaxies; Galactic centre; Galactic halo; Galaxy clusters; Axion-like particles; Lorentz invariance violations; Neutrino; Magnetic monopoles; Gravitational waves
资金
- Ministerio de Ciencia, Tecnologia e Innovacion Productiva (MinCyT), Argentina
- Comision Nacional de Energia Atomica (CNEA), Argentina
- Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET) Argentina
- State Committee of Science of Armenia
- Ministry for Research, France
- CNRS-INSU, France
- CNRS-IN2P3, France
- Irfu-CEA, France
- ANR, France
- Max Planck Society, Germany
- BMBF, Germany
- DESY, Germany
- Helmholtz Association, Germany
- MIUR, Italy
- Netherlands Research School for Astronomy (NOVA)
- Netherlands Organization for Scientific Research (NWO)
- Ministry of Science and Higher Education, Poland
- National Centre for Research and Development, Poland
- MICINN, Spain
- CPAN, Spain
- MultiDark Consolider-Ingenio programme, Spain
- Swedish Research Council, Sweden
- Royal Swedish Academy of Sciences, Sweden
- Swiss National Science Foundation (SNSF), Switzerland
- Leverhulme Trust, K
- Royal Society, UK
- Science and Technologies Facilities Council, UK
- Durham University, UK
- National Science Foundation, USA
- Department of Energy, USA
- Argonne National Laboratory, USA
- University of California, USA
- University of Chicago, USA
- Iowa State University, USA
- Institute for Nuclear and Particle Astrophysics (INPAC-MRPI), USA
- Washington University McDonnell Centre for the Space Sciences, USA
- Science and Technology Facilities Council (STFC) [ST/G003084/1]
- Spanish Consolider-Ingenio CPAN [CPAN09-PD13]
- Multidark [CSD2009-00064]
- GdR PCHE in France
- Science and Technology Facilities Council [ST/J001600/1, ST/G003084/1, ST/J003646/1 CTA, ST/J003646/1, ST/J000388/1] Funding Source: researchfish
- STFC [ST/G003084/1, ST/J001600/1, ST/J003646/1, ST/J000388/1] Funding Source: UKRI
The Cherenkov Telescope Array (CTA) is a project for a next-generation observatory for very high energy (GeV-TeV) ground-based gamma-ray astronomy, currently in its design phase, and foreseen to be operative a few years from now. Several tens of telescopes of 2-3 different sizes, distributed over a large area, will allow for a sensitivity about a factor 10 better than current instruments such as H.E.S.S, MAGIC and VERITAS, an energy coverage from a few tens of GeV to several tens of TeV, and a field of view of up to 10 degrees. In the following study, we investigate the prospects for CIA to study several science questions that can profoundly influence our current knowledge of fundamental physics. Based on conservative assumptions for the performance of the different CTA telescope configurations currently under discussion, we employ a Monte Carlo based approach to evaluate the prospects for detection and characterisation of new physics with the array. First, we discuss cm prospects for cold dark matter searches, following different observational strategies: in dwarf satellite galaxies of the Milky Way, which are virtually void of astrophysical background and have a relatively well known dark matter density; in the region close to the Galactic Centre, where the dark matter density is expected to be large while the astrophysical background due to the Galactic Centre can be excluded; and in clusters of galaxies, where the intrinsic flux may be boosted significantly by the large number of halo substructures. The possible search for spatial signatures, facilitated by the larger field of view of CIA, is also discussed. Next we consider searches for axion-like particles which, besides being possible candidates for dark matter may also explain the unexpectedly low absorption by extragalactic background light of gamma-rays from very distant blazars. We establish the axion mass range CIA could probe through observation of long-lasting flares in distant sources. Simulated light-curves of flaring sources are also used to determine the sensitivity to violations of Lorentz invariance by detection of the possible delay between the arrival times of photons at different energies. Finally, we mention searches for other exotic physics with CTA. (C) 2012 Elsevier B.V. All rights reserved.
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