Cosmic ray spectrum from 250 TeV to 10 PeV using IceTop

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doi:10.1103/physrevd.102.122001

Cited by 32 publications

(24 citation statements)

References 43 publications

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“…The all-particle spectrum was calculated by summing the contributions of each elemental fit, which can be seen in Figure 3 for all three of our cases. Our calculated all-particle spectra for the 3 cases are compared to compiled all-particle data from various experiments ( [10,11] and references therein) and Gaisser's H3a fit [10]. Generally, our results are lower than the all-particle data below 10 5 GeV.…”

Section: Pos(icrc2021)1220mentioning

confidence: 73%

Cosmic Ray Elemental Spectra and Atmospheric Neutrino Fluxes

Scrandis¹,

Bowman²,

Seo³

2021

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)

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Atmospheric neutrinos are produced when cosmic rays interact with Earth's atmosphere. The relationship between the cosmic ray spectrum and the neutrino spectrum is especially important around the cosmic ray all-particle knee. These energies correspond to the regime in which astrophysical neutrinos begin to dominate the neutrino flux, so accurate modeling of the cosmicray spectrum around the knee can be used to help separate background from signal. Currently, direct measurements of elemental spectra reach their upper energy limit just below the all-particle knee, requiring extrapolation in order to probe the transitional neutrino source energy regime. In this work, the cosmic ray knee is modeled as a transition between acceleration sources, each with a rigidity dependent acceleration limit. Cosmic-ray particles reach the limit at Z * E where Z is the particle charge and E is proton's limit. Utilizing the Matrix Cascade Equations code, cosmic-ray elemental spectra were used to calculate resulting atmospheric neutrino fluxes. Various parameterizations to model cosmic rays are explored, the effects of the resulting elemental spectra on the neutrino fluxes are investigated, and the neutrino results are compared to experimental data.

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Section: Pos(icrc2021)1220mentioning

confidence: 73%

Cosmic Ray Elemental Spectra and Atmospheric Neutrino Fluxes

Scrandis¹,

Bowman²,

Seo³

2021

Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021)

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show abstract

“…In the right panel of Fig. 2 we show the all-particle spectra, compared with observations( [61][62][63][64][65][66][67][68]). As can be seen, When the proton cutoff rigidity R c is 980TV, the expected H+He spectra from the background sources is consistent with the Tibet observation, but in such a case, that model calculation can not describe the all-particle spectrua.…”

Section: Spectra Of H+he and All-particlementioning

confidence: 99%

“…The measurements are from WFCTA [7,59], HAWC [60], ARGO-YBJ [5], NUCLEON [58], CREAM [57] and Tibet-ASγ [4]. The all-particle data are taken from Horandel [61], TALE [62], IceTop [63,64], Tibet [65], HAWC [66], NUCLEON [67] and ARGO-YBJ [68].…”

Section: Diffuse γ Raysmentioning

confidence: 99%

Constraining the position of the knee in the galactic cosmic ray spectrum with ultra-high-energy diffuse $γ$-rays

Zhang¹,

Guo²,

Qiao³

et al. 2021

Preprint

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The diffuse γ-ray was measured up to 957 TeV by the Tibet-ASγ experiment. Presuming it is produced by the hadronic interaction between cosmic ray nuclei and the interstellar medium, it requires that the cosmic ray nuclei should be accelerated well beyond PeV energies. However, measurements of the spectrum of proton and Helium by a few experiments show break below PeV. To solve this apparent discrepancy, we propose in this work that a new structure of cosmic rays may exist beyond PeV, which can contribute to the highest energy diffuse γ rays. This additional component may serve as another population of Galactic cosmic ray accelerators, and can contribute to the cosmic ray fluxes beyond the second knee. Future measurements of the energy spectra of different nuclei species may test the existence of this new component.

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“…Important for understanding GCR is first and foremost a precise knowledge of the all-particle energy spectrum and the elemental composition of cosmic rays in the entire transition range from 100 TeV to 10 EeV of primary energy. IceCube has delivered important milestones, first with the composition paper [4] from three years of data taking and now recently with the reconstruction of the lower energy spectrum in the 100 TeV -1 PeV range [9]. With a new trigger that selects events in closely spaced detectors in the center of the array, the IceTop energy threshold has been lowered by almost an order of magnitude below its previous threshold of 2 PeV.…”

Section: Cosmic-ray Physics At the South Polementioning

confidence: 99%

Cosmic-Ray Studies with the Surface Instrumentation of IceCube

Haungs¹

2021

Preprint

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IceCube is a cubic-kilometer Cherenkov detector installed in deep ice at the geographic South Pole. IceCube's surface array, IceTop, measures the electromagnetic signal and mainly low-energy muons from extensive air showers above several 100 TeV primary energy, with shower bundles and high-energy muons detected by the in-ice detector IceCube. In combination, the in-ice detector and IceTop provide unique opportunities to study cosmic rays in detail with large statistics. This contribution summarizes recent results from these studies. In addition, the IceCube-Upgrade will include a considerable enhancement of the surface detector through the installation of scintillation detectors and radio antennas and possibly small air-Cherenkov telescopes. We will discuss the results of the prototype detectors installed at the South Pole and the prospects of this enhancement as well as the surface array planned for IceCube-Gen2.

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Cosmic ray spectrum from 250 TeV to 10 PeV using IceTop

Cited by 32 publications

References 43 publications

Cosmic Ray Elemental Spectra and Atmospheric Neutrino Fluxes

Cosmic Ray Elemental Spectra and Atmospheric Neutrino Fluxes

Constraining the position of the knee in the galactic cosmic ray spectrum with ultra-high-energy diffuse $γ$-rays

Cosmic-Ray Studies with the Surface Instrumentation of IceCube

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