Astrophysical explosions: from solar flares to cosmic gamma-ray bursts

Wheeler, J. C.

doi:10.1098/rsta.2011.0351

Cited by 8 publications

(4 citation statements)

References 82 publications

(119 reference statements)

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“…One can see from Table 1 that the energy released through the conversion of gravitons to photons using the mechanism detailed by Raffelt and Stodolsky remains significant, similar in magnitude to solar flares occurring on the surface of the sun [16]. Furthermore the fluxes are quite bright and therefore potentially detectable.…”

Section: Resultsmentioning

confidence: 88%

Using Gravitational Wave Observations to Probe Quantum Gravity

Tarrant¹,

Colafrancesco²

2018

Proceedings of 5th Annual Conference on High Energy Astrophysics in Southern Africa — PoS(HEASA2017)

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Electromagnetic radiation is known to be associated with certain gravitational waves events, i.e. the collision of binary neutron stars. Establishing this connection is non-trivial. However, if electromagnetic counterparts could be produced by directly converting gravitons into photons, then a simple smoking gun test exists linking the two events. This model uses the general and conversion mechanism discussed by Raffelt and Stodolsky. Furthermore, because this mechanism is generic to the symmetries of general relativity and the standard model and because it assumes a quantised gravitational field, we may probe both the existence of the graviton and the scale at which quantum gravity effects (and thus very high-energy phenomena) become relevant using simple low-energy experiments.

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Section: Resultsmentioning

confidence: 88%

Using Gravitational Wave Observations to Probe Quantum Gravity

Tarrant¹,

Colafrancesco²

2018

Proceedings of 5th Annual Conference on High Energy Astrophysics in Southern Africa — PoS(HEASA2017)

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“…Firestone (2014; hereafter F14) bases arguments for abundant moderately nearby SNe (Wheeler 2012) on data of measured cosmogenic isotope deposition and nitrate accumulation in terrestrial archives. The claimed rate of 23 SNe within 300 pc of the Earth within the last 300 kyr would exceed the average galactic rate by a factor of 4; so the claim is suspicious if only on this basis.…”

Section: Introduction: Ionizing Radiation From Supernovae (Sne)mentioning

confidence: 99%

Has the Earth been exposed to numerous supernovae within the last 300 kyr?

Melott

Usoskin

Kovaltsov³

et al. 2014

International Journal of Astrobiology

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Firestone (2014) asserted evidence for numerous (23) nearby (d < 300 pc) supernovae (SNe) within the Middle and Late Pleistocene. If true, this would have strong implications for the irradiation of the Earth; at this rate, the mass extinction level events due to SNe would be more frequent than 100 Myr. However, there are numerous errors in the application of past research. The paper overestimates likely nitrate and 14 C production from moderately nearby SNe by about four orders of magnitude. Moreover, the results are based on wrongly selected (obsolete) nitrate and 14 C datasets. The use of correct and up-to-date datasets does not confirm the claimed results. The claims in the paper are invalid.

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“…the ratio of the characteristic physical size (R) and the propagation speed (v) of any kind of disturbance initiated during the release (see, e.g. Wheeler 2012). A typical characteristic of these explosions is that the rising time of energy release is very short in comparison with the decay phase independently of the physics behind these explosions.…”

Section: Introductionmentioning

confidence: 99%

Statistical relationship between the succeeding solar flares detected by the RHESSI satellite

Balázs

Gyenge

Korsós

et al. 2014

Monthly Notices of the Royal Astronomical Society

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The Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) has observed more than 80,000 solar energetic events since its launch on February 12 th , 2002. Using this large sample of observed flares, we studied the spatio-temporal relationship between succeeding flares. Our results show that the statistical relationship between the temporal and spatial differences of succeeding flares can be described as a power law of the form R(t) ∼ t p with p = 0.327±0.007. We discuss the possible interpretations of this result as a characteristic function of a supposed underlying physics. Different scenarios are considered to explain this relation, including the case where the connectivity between succeeding events is realised through a shock wave in the post Sedov-Taylor phase or where the spatial and temporal relationship between flares is supposed to be provided by an expanding flare area in the sub-diffusive regime. Furthermore, we cannot exclude the possibility that the physical process behind the statistical relationship is the reordering of the magnetic field by the flare or it is due to some unknown processes.

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Astrophysical explosions: from solar flares to cosmic gamma-ray bursts

Cited by 8 publications

References 82 publications

Using Gravitational Wave Observations to Probe Quantum Gravity

Using Gravitational Wave Observations to Probe Quantum Gravity

Has the Earth been exposed to numerous supernovae within the last 300 kyr?

Statistical relationship between the succeeding solar flares detected by the RHESSI satellite

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