Science Case for a Wide Field-of-View Very-High-Energy Gamma-ray Observatory in the Southern Hemisphere

Albert, A.; Harding, J. Patrick

doi:10.2172/1565800

Cited by 44 publications

(40 citation statements)

References 215 publications

(241 reference statements)

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“…The sensitivity of SGSO to DM annihilations/decays can be found by comparing the number of observable gamma rays with the expected background (see [39]). The statistical tool used to derive limits is a 2D (energy and space) joint-likelihood method, where the comparisons between DM and background fluxes are performed in different energy and spatial intervals (or bins) [18].…”

Section: Analysis Methodologymentioning

confidence: 99%

Searching for dark matter in the Galactic halo with a wide field of view TeV gamma-ray observatory in the Southern Hemisphere

Viana

Schoorlemmer

Albert

et al. 2019

J. Cosmol. Astropart. Phys.

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Despite mounting evidence that astrophysical dark matter exists in the Universe, its fundamental nature remains unknown. In this paper, we present the prospects to detect and identify dark matter particles through the observation of very-high-energy ( TeV) gamma-rays coming from the annihilation or decay of these particles in the Galactic halo. The observation of the the Galactic Center and a large fraction of the halo by a future wide field-of-view gamma-ray observatory located in the southern hemisphere would reach unprecedented sensitivity to dark matter particles in the mass range of ∼500 GeV to ∼2 PeV. Combined with other gamma-ray observatories (present and future) a thermal relic annihilation cross-section could be probed for all particle masses from ∼80 TeV down to the GeV range in most annihilation channels.

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Section: Analysis Methodologymentioning

confidence: 99%

Searching for dark matter in the Galactic halo with a wide field of view TeV gamma-ray observatory in the Southern Hemisphere

Viana

Schoorlemmer

Albert

et al. 2019

J. Cosmol. Astropart. Phys.

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“…Thanks to its sensitivity, CTA will likely discover numerous extremely hard objects, too faint to be detected with Fermi -LAT and current TeV instruments. The CTA survey of a quarter of the extragalactic sky, complemented in the multi-TeV range by LHAASO [83] and SWGO [84], will provide for the first time an unbiased view on the extreme-TeV population, blazars and their off-axis counterparts. This latter subclass of radio galaxies constitutes a promising field of research both for AGN population studies and for the search of the origin of UHECRs.…”

Section: Perspectivesmentioning

confidence: 99%

Progress in unveiling extreme particle acceleration in persistent astrophysical jets

Biteau

Prandini

Costamante³

et al. 2020

Nat Astron

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The most powerful persistent accelerators in the Universe are jetted active galaxies. Galaxies whose jets are directed towards Earth, so called blazars, dominate the extragalactic γ-ray sky. Still, most of the highest-energy accelerators likely elude detection. These extreme blazars, whose radiated energy can peak beyond 10 TeV, are ideal targets to study particle acceleration and radiative processes, and may provide links to cosmic rays and astrophysical neutrinos. The growing number of extreme blazars observed at TeV energies has been critical for the emergence of γ-ray cosmology, including measurements of the extragalactic background light, tight bounds on the intergalactic magnetic field, and constraints on exotic physics at energies inaccessible with human-made accelerators. Tremendous progress is expected in the decade to come, particularly with the deployment of the Cherenkov Telescope Array.

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“…Or in the case when these observatories are used to perform measurement of the hadronic cosmic rays (for example [12]). Finally, hadron simulations are required to estimate the sensitivity of future gamma-ray observatories, such as the Cherenkov Telescope Array (CTA) [13], the Southern Gamma-ray Survey Observatory (SGSO) [14], and the Large High Altitude Air Shower Observatory (LHAASO) [15] which could be affected by the choice of models. The advent of LHC measurements has provided large amounts of data at never before probed energies [16] and at extreme rapidities [17,18].…”

Section: Introductionmentioning

confidence: 99%

Systematic differences due to high energy hadronic interaction models in air shower simulations in the 100 GeV-100 TeV range

Parsons

Schoorlemmer

2019

Phys. Rev. D

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The predictions of hadronic interaction models for cosmic-ray induced air showers contain inherent uncertainties due to limitations of available accelerator data and theoretical understanding in the required energy and rapidity regime. Differences between models are typically evaluated in the range appropriate for cosmic-ray air shower arrays (10 15 -10 20 eV). However, accurate modelling of charged cosmic-ray measurements with ground based gamma-ray observatories is becoming more and more important.We assess the model predictions on the gross behaviour of measurable air shower parameters in the energy (0.1-100 TeV) and altitude ranges most appropriate for detection by ground-based gammaray observatories. We go on to investigate the particle distributions just after the first interaction point, to examine how differences in the micro-physics of the models may compound into differences in the gross air shower behaviour. Differences between the models above 1 TeV are typically less than 10%. However, we find the largest variation in particle densities at ground at the lowest energy tested (100 GeV), resulting from striking differences in the early stages of shower development.

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Science Case for a Wide Field-of-View Very-High-Energy Gamma-ray Observatory in the Southern Hemisphere

Cited by 44 publications

References 215 publications

Searching for dark matter in the Galactic halo with a wide field of view TeV gamma-ray observatory in the Southern Hemisphere

Searching for dark matter in the Galactic halo with a wide field of view TeV gamma-ray observatory in the Southern Hemisphere

Progress in unveiling extreme particle acceleration in persistent astrophysical jets

Systematic differences due to high energy hadronic interaction models in air shower simulations in the 100 GeV-100 TeV range

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