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We consider the effect of a random magnetic field in the convective zone of the Sun superimposed to a regular magnetic field on resonant neutrino spin-flavour oscillations. We argue for the existence of a field of strongly chaotic nature at…

High Energy Physics - Phenomenology · Physics 2009-10-31 V. B Semikoz , E. Torrente-Lujan

Recent analysis of the Homestake data indicates that the solar neutrino flux contains a periodic variation that may be attributed to rotational modulation occurring deep in the solar interior, either in the tachocline or in the radiative…

Astrophysics · Physics 2009-10-31 P. A. Sturrock , J. D. Scargle , G. Walther , M. S. Wheatland

We have evolved 10,000 solar models using 21 input parameters that are randomly drawn for each model from separate probability distributions for every parameter. We use the results of these models to determine the theoretical uncertainties…

Astrophysics · Physics 2008-11-26 John N. Bahcall , Aldo M. Serenelli , Sarbani Basu

The observed variability of the cosmic-ray intensity in the interplanetary space is driven by the evolution of the Sun's magnetic activity over its 11-year quasiperiodical cycle. Investigating the relationship between solar activity indices…

Solar and Stellar Astrophysics · Physics 2022-10-13 Nicola Tomassetti , Bruna Bertucci , Emanuele Fiandrini

The variable Sun is the most likely candidate for natural forcing of past climate change on time scales of 50 to 1000 years. Evidence for this understanding is that the terrestrial climate correlates positively with solar activity. During…

Solar and Stellar Astrophysics · Physics 2015-05-27 A. I. Shapiro , W. Schmutz , E. Rozanov , M. Schoell , M. Haberreiter , A. V. Shapiro , S. Nyeki

Lepton number charges might be the source of long range forces. If one accepts that neutrinos produced in the Sun do indeed oscillate while crossing the interior of the Sun, then the shift in the phase of the neutrino wavefunction caused by…

High Energy Physics - Phenomenology · Physics 2015-06-25 J. A. Grifols , E. Masso

Since the end of the eighties and in response to a reported increase in the total neutrino flux in the Homestake experiment in coincidence with solar flares, solar neutrino detectors have searched for solar flare signals. Even though these…

High Energy Astrophysical Phenomena · Physics 2015-05-22 G. de Wasseige , K. Hanson , N. van Eijndhoven , P. Evenson , K. -L. Klein

The variability of the spectral solar irradiance (SSI) over the course of the 11-year solar cycle is one of the manifestations of solar magnetic activity. There is a strong evidence that the SSI variability has an effect on the Earth's…

Solar and Stellar Astrophysics · Physics 2020-04-29 Anna V. Shapiro , Alexander I. Shapiro , Laurent Gizon , Natalie A. Krivova , Sami K. Solanki

Studies on the periodic variation and the phase relationship between different solar activity indicators are useful for understanding the long-term evolution of solar activity cycle. Here we report the statistical analysis of grouped solar…

Solar and Stellar Astrophysics · Physics 2020-03-11 Hui Deng , Ying Mei , Feng Wang

More than 40 years ago, neutrinos where conceived as a way to test the validity of the solar models which tell us that stars are powered by nuclear fusion reactions. The first measurement of the neutrino flux, in 1968 in the Homestake mine…

High Energy Physics - Experiment · Physics 2009-05-12 Lino Miramonti

The structure of electric current and magnetic helicity in the solar corona is closely linked to solar activity over the 11-year cycle, yet is poorly understood. As an alternative to traditional current-free "potential field"…

Solar and Stellar Astrophysics · Physics 2015-05-18 A. R. Yeates , J. A. Constable , P. C. H. Martens

The Schwabe (~11 yr) value for the annual sunspot number is sometimes uncritically applied to other measures of solar activity, direct and indirect, including the 10.7 cm radio flux, the inflow of galactic cosmic rays, solar flare…

Solar and Stellar Astrophysics · Physics 2022-12-08 Claudio Vita-Finzi

The interaction of neutrino transition magnetic dipole moments with magnetic fields can give rise to the phenomenon of neutrino spin-flavour precession (SFP). For Majorana neutrinos, the combined action of SFP of solar neutrinos and flavour…

High Energy Physics - Phenomenology · Physics 2022-10-27 Evgeny Akhmedov , Pablo Martínez-Miravé

Solar oscillations frequencies show a distinct change with solar activity. The changes in frequencies can be used to study the time variation of solar structure. We discuss constraints on the changes in solar structure with time as obtained…

Astrophysics · Physics 2007-05-23 Sarbani Basu

We derive formulae connecting the frequency variations in the spectrum of solar oscillations to the dynamical quantities that are expected to change over the solar activity cycle. This is done for both centroids and the asymmetric part of…

Astrophysics · Physics 2009-11-10 W. A. Dziembowski , P. R. Goode

The existing measurements of the solar neutrino flux are compared with the predictions of all models capable of reproducing the other solar observables. These predictions are supplemented by the hypothesis of neutrino oscillations with mass…

High Energy Physics - Phenomenology · Physics 2007-05-23 G. Conforto , C. Grimani , F. Martelli , F. Vetrano

The principal aim of observational helioseismology is to determine mode parameters of the solar oscillations as accurately as possible. Yet estimates of the mode parameters are subject to many sources of noise, including inevitable gaps in…

Astrophysics · Physics 2009-11-07 Heon-Young Chang

We have studied the importance of the combined effects of rotation, diffusion, and convective overshoot on the p-mode oscillation spectrum and the neutrino flux of the standard solar model. To isolate the various physical affects included…

Astrophysics · Physics 2016-08-30 Brian Chaboyer , P. Demarque , D. B. Guenther , M. H. Pinsonneault

The role of magnetic field decay in normal radio pulsars is still debated. In this paper we present results which demonstrate that an episode of magnetic field decay in hot young neutron stars can explain anomalous values of braking indices…

High Energy Astrophysical Phenomena · Physics 2021-03-31 A. P. Igoshev , S. B. Popov

The Schwabe cycle of solar activity exhibits modulations and frequency fluctuations on slow time scales of centuries and millennia. Plausible physical explanations for the cause of these long-term variations of the solar cycle are still…

Solar and Stellar Astrophysics · Physics 2022-02-08 Breno Raphaldini , André Seiji Teruya , Carlos Frederico Mendonca Raupp , Miguel D. Bustamante
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