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To foresee a solar flare neutrino signal we infer its upper and lower bound. The upper bound was derived since a few years by general energy equipartition arguments on observed solar particle flare. The lower bound, the most compelling one…

Astrophysics · Physics 2010-04-21 Daniele Fargion , Paola Di Giacomo

We have used the Date-Compensated Discrete Fourier Transform and Periodogram analysis of the solar neutrino flux data from 1) 5-day-long samples from Super-Kamiokande-I detector during the period from June, 1996 to July, 2001; 2)…

High Energy Physics - Phenomenology · Physics 2007-05-23 Abu Salem Mandal , Koushik Ghosh , Probhas Raychaudhuri

The variation with time from 1956-2002 of the globally averaged rate of ionization produced by cosmic rays in the atmosphere is deduced and shown to have a cyclic component of period roughly twice the 11 year solar cycle period. Long term…

Geophysics · Physics 2009-11-13 A. D. Erlykin , T. Sloan , A. W. Wolfendale

With an aim to examine how much information of solar rotation can be obtained purely spectroscopically by observing the sun-as-a-star during the 2012 May 21 eclipse at Okayama Astrophysical Observatory, we studied the variation of radial…

Solar and Stellar Astrophysics · Physics 2015-06-23 Yoichi Takeda , Osamu Ohshima , Eiji Kambe , Hiroyuki Toda , Hisashi Koyano , Bun'ei Sato , Yasuhisa Nakamura , Norio Narita , Takashi Sekii

Helioseismology has shown that the chemical composition of the Sun has changed over its lifetime. The surface abundance of helium and heavy elements is believed to have decreased by up to 10% relative to their initial values. However, this…

Astrophysics · Physics 2015-06-24 S. Turcotte , R. F. Wimmer-Schweingruber

In recent work, Milian-Sanchez et al. observed fluctuations in radioactive decay rate measurement series, and after excluding environmental influences (measured indoors) as root causes, they looked for possible correlations with…

Nuclear Experiment · Physics 2021-08-03 Stefaan Pommé , Krzysztof Pelczar

The experimental data on continuous investigation of changes in beta-decay count rate of Cs-137 and Co-60 from 9.12.98 till 30.04.99, are presented. The 27-day and 24-hour periods in these changes, inexplicable by traditional physics, have…

High Energy Physics - Experiment · Physics 2007-05-23 Yu. A. Baurov , Yu. G. Sobolev , V. F. Kushniruk , A. N. Kuznetzov , A. A. Konradov

This paper is a continuation of a study by Douglass and Clader. We extend the analysis through December 2003 using the latest updates of the observational temperature and solar irradiance data sets in addition to a new volcano proxy data…

Geophysics · Physics 2007-05-23 David H. Douglass , B. David Clader , Robert S. Knox

Several mechanisms have been proposed to explain the transient seis- mic emission, i.e., sunquakes, from some solar flares. Some theories associate high-energy electrons and/or white-light emission with sunquakes. High-energy charged…

Solar and Stellar Astrophysics · Physics 2015-12-09 J. C. Buitrago-Casas , J. C. Martinez Oliveros , C. Lindsey , B. Calvo-Mozo , S. Krucker , L. Glesener , S. Zharkov

There has for some time been evidence of variability in radiochemical solar neutrino measurements, but this evidence has seemed suspect since the cerenkov experiments have not shown similar evidence of variability. The present re-analysis…

High Energy Physics - Phenomenology · Physics 2009-11-13 P. A. Sturrock

An in-depth analysis of variability has been carried out on the 2 GHz and 8 GHz light curves from the impressive database of the US Navy's extragalactic source monitoring program at the Green Bank Interferometer (GBI), complemented by UMRAO…

High Energy Astrophysical Phenomena · Physics 2025-02-05 Nicola Marchili , Gunther Witzel , Margo F. Aller

We investigate the dependence of the amount of the observed galactic cosmic ray (GCR) influx on the solar North-South asymmetry using the neutron count rates obtained from four stations and sunspot data in archives spanning six solar cycles…

Earth and Planetary Astrophysics · Physics 2015-05-27 Il-Hyun Cho , Young-Sil Kwak , Heon-Young Chang , Kyung-Suk Cho , Young-Deuk Park , Ho-Sung Choi

An experiment carried out at the Brookhaven National Laboratory from February 1982 to December 1989 acquired 364 measurements of the beta-decay rates of a sample of 36Cl and of a sample of 32Si. The experimenters reported finding small…

High Energy Physics - Phenomenology · Physics 2015-11-30 P. A. Sturrock , E. Fischbach

We have evaluated fluctuations in neutrino fluxes caused by solar gravity (g) modes based on the analysis of linear adiabatic oscillation of a spherically symmetric star. We find that the first-order fluctuation is zero due to geometrical…

Solar and Stellar Astrophysics · Physics 2026-04-09 Yoshiki Hatta , Yuuki Nakano , Sho Sugama , Masanobu Kunitomo , Hiroshi Ito , Takashi Sekii

Sixteen years of meteor radar data from the Canadian Meteor Orbit Radar (CMOR) were used to investigate the link between observed meteor rates and both solar and geomagnetic activity. Meteor rates were corrected for transmitter power and…

Earth and Planetary Astrophysics · Physics 2019-03-20 Margaret D. Campbell-Brown

We consider the possibility of solar neutrino decay as a sub-leading effect on their propagation between production and detection. Using current oscillation data, we set a new lower bound to the $\nu_2$ neutrino lifetime at $\tau_2\, /\,…

High Energy Physics - Phenomenology · Physics 2016-08-10 R. Picoreti , M. M. Guzzo , P. C. de Holanda , O. L. G. Peres

We have used Rayleigh power spectrum analysis of the monthly solar neutrino flux data from (1) SAGE detector during the period from 1st January 1990 to 31st December 2000; (2) SAGE detector during the period from April 1998 to December…

Astrophysics · Physics 2007-05-23 Koushik Ghosh , Probhas Raychaudhuri

The XENON1T experiment recently reported an excess of events at low electron recoil energies, which may be due to interactions of solar neutrinos inside the detector via a large neutrino magnetic moment. We point out that a $^{51}$Cr…

High Energy Physics - Phenomenology · Physics 2020-06-30 Pilar Coloma , Patrick Huber , Jonathan M. Link

A series of recent reports suggest that the decay rates of several isotopes may have been influenced by solar activity (perhaps by solar neutrinos). A mechanism in which neutrinos or antineutrinos can influence the decay process suggests…

Nuclear Experiment · Physics 2014-07-17 J. M. Nistor , J. M. Heim , E. Fischbach , J. H. Jenkins , P. A. Sturrock

The Sun has long been considered a constant star, to the extent that its total irradiance was termed the solar constant. It required radiometers in space to detect the small variations in solar irradiance on timescales of the solar rotation…

Solar and Stellar Astrophysics · Physics 2015-06-11 Sami K. Solanki , Yvonne C. Unruh