Relativistic Correction to the Movement of Magnetic Poles

Ng, K. K.

doi:10.1088/0004-637x/714/1/675

Cited by 5 publications

(4 citation statements)

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“…The Sun’s magnetic dipole, according to their reconstruction, is rotated from its initial axial position and oriented gradually toward its opposite heliographic pole 3 . The rotational movement of the Sun’s magnetic dipole, as interpreted in their analysis in a phenomenon called a magnetic pole reversal, is consistent with the trajectory motion 4 of the magnetic moment under the action of an electromagnetic torque τ y of Equation (2) to be shown below.…”

Section: Resultssupporting

confidence: 66%

“…Olson 30 has summarized the results discovered by Hulot et al 31 that two regions of reversed magnetic flux concentrated on the core-mantle boundary of the Earth have been identified. Also, as described in the section above, two precessing magnetic moments have been identified unambiguously in the pulsar PSR B1828–11 4 14 .…”

Section: Resultsmentioning

confidence: 61%

“…They have presented a strong evidence that a precession has occurred in the pulsar. It is found that the unique signature in the radio signals on the precession can best be explained by two precessing magnetic moments in the pulsar 4 when the x-component τ x of the electromagnetic torque described above is included.…”

Section: Resultsmentioning

confidence: 99%

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Prediction Methods in Solar Sunspots Cycles

2016

Sci Rep

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An understanding of the Ohl’s Precursor Method, which is used to predict the upcoming sunspots activity, is presented by employing a simplified movable divided-blocks diagram. Using a new approach, the total number of sunspots in a solar cycle and the maximum averaged monthly sunspots number Rz(max) are both shown to be statistically related to the geomagnetic activity index in the prior solar cycle. The correlation factors are significant and they are respectively found to be 0.91 ± 0.13 and 0.85 ± 0.17. The projected result is consistent with the current observation of solar cycle 24 which appears to have attained at least Rz(max) at 78.7 ± 11.7 in March 2014. Moreover, in a statistical study of the time-delayed solar events, the average time between the peak in the monthly geomagnetic index and the peak in the monthly sunspots numbers in the succeeding ascending phase of the sunspot activity is found to be 57.6 ± 3.1 months. The statistically determined time-delayed interval confirms earlier observational results by others that the Sun’s electromagnetic dipole is moving toward the Sun’s Equator during a solar cycle.

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Section: Resultssupporting

confidence: 66%

Section: Resultsmentioning

confidence: 61%

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Prediction Methods in Solar Sunspots Cycles

2016

Sci Rep

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“…n = 2.91 ± 0.05 for Pulsar J1119-6127) [25]. In a Cartesian coordinate xyz system, the angular momentum L is directed along the z-axis, the magnetic moment M, which is lying in the yz plane, is inclined at a polar angle θ to the angular momentum L. The electromagnetic torque involved in the magnetic poles reversal is τ y [24,26], as shown in Equation (2), τ y = Ω 3 sinθcosθ (2) The rotation of a magnetic dipole having a polar angle θ for three initially different starting angles θ i =0.5°, 5° and 30°, is plotted as shown in Figure 7. It has been known that two opposing magnetic poles occupy the north and south polar caps at solar minimum [20,27].…”

Section: Resultsmentioning

confidence: 99%

Coronal Mass Ejections, Solar Cycles and Magnetic Poles Reversal

Ng¹

2019

AJAA

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The magnitude of the measured geomagnetic index increases when the Coronal Mass Ejections occur on the Sun's surface. The abrupt increase in the geomagnetic index has seriously impacted the accuracy in the forecast of the activity of the next solar cycle. A method is proposed to filter the effect from the Coronal Mass Ejections. The correlation between the geomagnetic index and the activity of the subsequent solar cycle is found to have drastically improved with the proposed scheme. A strong correlation between the maximum amplitude R N of a solar cycle N and its pre-cycle coronal mass ejections adjusted monthly geomagnetic activity index has been qualitatively determined, as illustrated by an impressive correlation coefficient of 0.91+0.09-0.12, with its statistical significance estimated at 4.3 σ. The corrected data have significantly improved the correlation between the observed variables from their original un-corrected case of 0.63 ± 0.23. Our result indicates that the upcoming solar cycle, estimated at R 25 = 147 ± 30, would be stronger than the current waning solar cycle 24. In a related calculation, the magnetic poles reversals occurring in the solar cycles 21 and 22 are reproduced numerically from Maxwell's electromagnetic equations.

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Dual Spin-Down States of the Pulsar J1001-5507

Chukwude

Buchner

2011

ApJ

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Relativistic Correction to the Movement of Magnetic Poles

Cited by 5 publications

References 20 publications

Prediction Methods in Solar Sunspots Cycles

Prediction Methods in Solar Sunspots Cycles

Coronal Mass Ejections, Solar Cycles and Magnetic Poles Reversal

Dual Spin-Down States of the Pulsar J1001-5507

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