High energy cosmic ray spectroscopy. III. Further analyses

Erlykin, A.D.; Wolfendale, A. W.

doi:10.1016/s0927-6505(97)00053-4

Cited by 35 publications

(24 citation statements)

References 14 publications

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“…Here we fit with f Z SNR (T ) ∝ T −α exp (−T /(ZE max /A)) because the published data is represented as a function of T . We assumed in this fitting E max = 500 TeV for example, and also assumed that (Z, A) are (7,14) for CNO-group and (12,24) for NeMgSi-group, respectively. We define the sum of these components shown in Fig.…”

Section: Model Spectrum (Two Components Model)mentioning

confidence: 99%

Galactic Modulation of Extragalactic Cosmic Rays: -- A Possible Origin of the Knee in the Cosmic Ray Spectrumc --

Muraishi

Yanagita

Yoshida

2005

Progress of Theoretical Physics

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The existence of the spectral break around ∼ 3 × 10 15 eV in the cosmic ray spectrum (referred to as the 'knee') is one of the biggest questions in cosmic ray astrophysics. At the same time, the origin of cosmic rays above the knee energies (between 10 15 and 10 18 eV) is also still unsettled. In this paper, we investigate how the hypothetical extragalactic CRs after modulated by the galactic wind contribute to the knee in the CR spectrum. We numerically calculate the modulated energy spectrum of the hypothetical cosmic rays coming into the galaxy from just outside of the "galactic sphere" where the galactic wind terminates. We show that the observed knee structure is reproduced well by a superposition of the modulated component and the galactic cosmic rays originating in supernova remnants. * ) For SN1006, there is discrepancy between the results of CANGAROO-I and HESS; an upper limit reported by HESS is below the flux detected by CANGAROO-I. 10) typeset using PTPT E X.cls Ver.0.9

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Section: Model Spectrum (Two Components Model)mentioning

confidence: 99%

Galactic Modulation of Extragalactic Cosmic Rays: -- A Possible Origin of the Knee in the Cosmic Ray Spectrumc --

Muraishi

Yanagita

Yoshida

2005

Progress of Theoretical Physics

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“…This argument of the CR origin is corroborated by recent observations of X-rays and TeV gamma-rays from SNRs [3,4,5,6,7,8,9,10]. Yet the origin of CRs above the knee is still not settled [11,12,13,14,15].…”

Section: Introductionmentioning

confidence: 64%

“…Here we fitted the published data of CR proton, helium, CNO-group, NeMgSi-group and iron in subTeV − TeV energy region which are believed to originate in SNRs in our galaxy [27,28,29,30,31,32]. We assumed in this fitting E max = 500 TeV, for example, and also assumed that (Z, A) are (7,14) for the CNO-group and (12,24) for the NeMgSi-group. We define the sum of these components as the SNR component, F SNR (E).…”

Section: Numerical Simulations and Resultsmentioning

confidence: 99%

Galactic modulation of extragalactic cosmic rays -Alternative scenario of the origin of the knee-

Muraishi

Yanagita

Yoshida

2006

J. Phys.: Conf. Ser.

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Recently we have shown that the observed knee structure is reproduced well by a superposition of the hypothetical extragalactic cosmic rays modulated by the galactic wind and the galactic cosmic rays originating in supernova remnants. We reexamine this model assuming the chemical composition of the hypothetical extragalactic cosmic rays is the same as that of the galactic cosmic rays of supernova origin. The knee structure is reproduced well again. The energy dependence of mean mass of cosmic rays above the knee energy is presented to be compared with observations. .

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“…It was proposed some time ago that GRBs are likely sites for the production of ultra high-energy cosmic rays (UHECRs; Waxman 1995) and that UHECRs, interacting with the microwave background, could produce GeV-TeV photons (Waxman & Coppi 1996). Indeed, Wick et al (2004), echoing the 'single source' model of Erlykin & Wolfendale (1998), have suggested that the high-energy cosmic rays in the vicinity of the 'knee' in the CR spectrum (Ew10 14 eV) in our galaxy could be produced by a single GRBz1 kpc from the Earth. Dermer (2006), noting that the X-ray lightcurves of approximately 30% of the Swift GRBs show a rapid decline some hundreds of seconds after the burst trigger, has shown that this would be expected if cosmic rays are accelerated in GRBs, due to a rapid depletion of the hadronic component by means of photopion production approximately 10 2 -10 4 s after the GRB explosion.…”

Section: (B ) Afterglow Emissionmentioning

confidence: 99%

Very high-energy gamma rays from gamma-ray bursts

Chadwick

2007

Phil. Trans. R. Soc. A.

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Very high-energy (VHE) gamma-ray astronomy has undergone a transformation in the last few years, with telescopes of unprecedented sensitivity having greatly expanded the source catalogue. Such progress makes the detection of a gamma-ray burst at the highest energies much more likely than previously. This paper describes the facilities currently operating and their chances for detecting gamma-ray bursts, and reviews predictions for VHE gamma-ray emission from gamma-ray bursts. Results to date are summarized.

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High energy cosmic ray spectroscopy. III. Further analyses

Cited by 35 publications

References 14 publications

Galactic Modulation of Extragalactic Cosmic Rays: -- A Possible Origin of the Knee in the Cosmic Ray Spectrumc --

Galactic Modulation of Extragalactic Cosmic Rays: -- A Possible Origin of the Knee in the Cosmic Ray Spectrumc --

Galactic modulation of extragalactic cosmic rays -Alternative scenario of the origin of the knee-

Very high-energy gamma rays from gamma-ray bursts

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