Correction to “First evidence at high latitudes for the ionospheric Alfvén resonator” by Pavel P. Belyaev, Tilmann Bösinger, S. V. Isaev, V. Y. Trakhtengerts, and J. Kangas

Belyaev, P. P.; Bösinger, T.; Isaev, S. V.; Trakhtengerts, V. Yu.; Kangas, J.

doi:10.1029/1999ja900165

Cited by 15 publications

(21 citation statements)

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“…Resonance features were reported by Demekhov et al (2000) to be "a regular feature" at the high latitude magnetometer station at Sodankylä, Finland (L∼5.1). These authors presented 4 days of observations from the stations at Nizhny Novgorod and Sodankylä, Finland, and used a model of the IAR (published in Izvestiya vuzov-Radiofizika by Belyaev et al in 1989) to make quantitative comparisons of the predicted spectra with the magnetic features. They found that the diurnal variation of the spectral resonance features could be well explained by the variation in the local ionospheric parameters.…”

Section: Introductionmentioning

confidence: 99%

A quantitative analysis of the diurnal evolution of Ionospheric Alfvén resonator magnetic resonance features and calculation of changing IAR parameters

et al. 2005

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Abstract. Resonance features of the Ionospheric AlfvénResonator (IAR) can be observed in pulsation magnetometer data from Sodankylä, Finland using dynamic spectra visualizations. IAR resonance features were identified on 13 of 30 days in October 1998, with resonance structures lasting for 3 or more hours over 10 intervals. The diurnal evolution of the harmonic features was quantified for these 10 intervals using a manual cursor-clicking technique. The resonance features displayed strong linear relationships between harmonic frequency and harmonic number for all of the time intervals studied, enabling a homogeneous cavity model for the IAR to be adopted to interpret the data. This enabled the diurnal variation of the effective size of the IAR to be obtained for each of the 10 time intervals. The average effective size was found to be 530 km, and to have an average variation of 32% over each time interval: small compared to the average variation in Alfvén velocity of 61%. Thus the diurnal variation of the harmonics is chiefly caused by the changing plasma density within the IAR due to changing insolation. This study confirms Odzimek (2004) that the dominating factor affecting the IAR eigenfrequencies is the variation in the Alfvén velocity at the F-layer ion-density peak, with the changing IAR size affecting the IAR eigenfrequencies to a smaller extent. Another IAR parameter was derived from the analysis of the IAR resonance features associated with the phase matching structure of the standing waves in the IAR. This parameter varied over the time intervals studied by 20% on average, possibly due to changing ionospheric conductivity.

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Section: Introductionmentioning

confidence: 99%

A quantitative analysis of the diurnal evolution of Ionospheric Alfvén resonator magnetic resonance features and calculation of changing IAR parameters

et al. 2005

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“…In particular it enters into computations of radiative meson decays [35,36], the muon anomalous magnetic moment [37,38], and chiral-odd proton distribution functions [39,40]. It has been calculated in QCD using a variety of theoretical tools [30][31][32][33] and most recently has been studied using holographic methods [19,34,41]. It has also been the subject of several lattice QCD computations [27][28][29].…”

Section: Results For the Magnetic Susceptibility Of The Quark Condensatementioning

confidence: 99%

“…Plugging in the solution for the c's, we find that the ρ sector contribution to (3.24) is 30) using the ρ sector versions of P , Q and S, as usual. Here T denotes transpose and the matrix in the denominator is to be understood as matrix multiplication by the inverse from the left.…”

Section: ρ Sectormentioning

confidence: 99%

Successes and failures of a more comprehensive hard wall AdS/QCD

Domokos

Harvey

Royston

2013

J. High Energ. Phys.

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We explore corrections to the "hard wall" gravity dual of QCD with two-form tensor fields b M N . These fields correspond to the quark bilinear O T =qσ µν q of QCD, which generates states with quantum numbers 1 −− and 1 +− , or ω/ρ-like and h 1 /b 1 -like mesons, respectively. We include new interaction terms, which render the model complete up to dimension six. We find that breaking chiral symmetry induces modifications to the spectrum, by mixing the vector current J V and O T , and breaking the degeneracy of the 1 −− and 1 +− spectra. We also compute the b 1 → ωπ decay rate and D/S ratio and the couplings of excited ρ states to two pions, performing a comprehensive new fit to the QCD data. We obtain a value for the magnetic susceptibility of the QCD quark condensate which is consistent with phenomenological estimates. These results allow us to evaluate the success of dimension counting and UV matching in this model.

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“…The IAR was detected for the first time as a result of studies of the fine structure of averaged spectra for the horizontal magnetic field of the natural electromagnetic background of the atmoshpere in the frequency range 1-10 Hz. Namely, a regularly observed spectral resonant structure (SRS), which is manifested as an alternation of noise maxima and minima with a frequency interval of several hertz and a modulation depth of tens of percent [16,17], was detected. Later, it was shown in [18] that the SRS is related to the existence of the IAR or, more exactly, is a consequence of the existence of a domain of violation of geometrical optics for waves in the ELF range in the transition from the ionosphere to the magnetosphere.…”

Section: Ionopspheric Alfvén Resonancesmentioning

confidence: 99%

Artificial ionospheric source of low-frequency electromagnetic fields in the problems of environment sounding

Polyakov

2008

Radiophys Quantum El

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We theoretically estimate the comparative efficiency of the conventional methods of sounding of the environmental processes and objects and the new techniques proposed in the literature, which use the effect of low-frequency field generation when natural ionospheric current systems are modulated by powerful radio emission from ground-based transmitters. Diagnostics of internal gravity waves, electromagnetic sounding of the Earth, diagnostics of the ionospheric Alfvén resonator, and magnetosphere location are considered. It is shown that except for the magnetosphere location, all analyzed techniques are inferior to the conventional methods in complexity, information capacity, and efficiency. Under favorable geophysical and geographical conditions, an ionospheric source of SLF and ULF electromagnetic fields can provide the most effective injection of waves into the magnetosphere.

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Correction to “First evidence at high latitudes for the ionospheric Alfvén resonator” by Pavel P. Belyaev, Tilmann Bösinger, S. V. Isaev, V. Y. Trakhtengerts, and J. Kangas

Cited by 15 publications

References 0 publications

A quantitative analysis of the diurnal evolution of Ionospheric Alfvén resonator magnetic resonance features and calculation of changing IAR parameters

A quantitative analysis of the diurnal evolution of Ionospheric Alfvén resonator magnetic resonance features and calculation of changing IAR parameters

Successes and failures of a more comprehensive hard wall AdS/QCD

Artificial ionospheric source of low-frequency electromagnetic fields in the problems of environment sounding

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