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The Sun exhibits episodic surges of magnetic activity across a range of temporal and spatial scales, the most prominent of which is the 11-ish year modulation of sunspot production. Beside the ~170 (min to max) decadal variation in sunspot…

太阳与恒星天体物理 · 物理学 2024-08-21 Scott W. McIntosh , Robert J. Leamon

A search for periodic modulations of the solar neutrino flux was performed using the Super-Kamiokande-I data taken from May 31st, 1996 to July 15th, 2001. The detector's capability of measuring the exact time of events, combined with a…

高能物理 - 实验 · 物理学 2014-11-17 J. Yoo

A new series of Earth occultation observations has been started in 2012 to refine the determination of the cosmic X-ray background by the INTEGRAL mission. We show here that the new detector lightcurves in the 3 to 160 keV range differ from…

高能天体物理现象 · 物理学 2013-02-27 M. Türler , N. Produit , L. Pavan , C. Ferrigno , P. Bordas

Gallium solar neutrino experiments have historically used radiochemical counting to determine the event rate. A detector which directly measures the ejected electron and de-excitation gamma could reduce background counting rates by way of a…

高能物理 - 实验 · 物理学 2024-11-27 Jonathan Folkerts , Nick Solomey , Brooks Hartsock , Tyler Nolan , Octavio Pacheco , Gregory Pawloski

Experimental measurements in terrestrial laboratory, space and astrophysical observations of variation and fluctuation of nuclear decay constants, measurements of large enhancements in fusion reaction rate of deuterons implanted in metals…

太阳与恒星天体物理 · 物理学 2009-11-19 M. Coraddu , M. Lissia , P. Quarati , A. M. Scarfone

Context. The most recent determination of the solar chemical composition, using a time-dependent, 3D hydrodynamical model of the solar atmosphere, exhibits a significant decrease of C, N, O abundances compared to their previous values.…

天体物理学 · 物理学 2011-03-28 A. Zaatri , J. Provost , G. Berthomieu , P. Morel , T. Corbard

Observations of open star clusters in the solar neighborhood are used to calculate local supernova (SN) rates for the past 510 million years (Myr). Peaks in the SN rates match passages of the Sun through periods of locally increased cluster…

太阳与恒星天体物理 · 物理学 2012-10-11 Henrik Svensmark

There are four important facts about solar neutrinos. They are listed in order of importance in this abstract and discussed more in the text of the talk. First, solar neutrinos have been detected in four experiments with approximately the…

天体物理学 · 物理学 2008-02-03 John N. Bahcall

The Russian-American experiment SAGE began to measure the solar neutrino capture rate with a target of gallium metal in Dec. 1989. Measurements have continued with only a few brief interruptions since that time. We give here the…

We analyze solar, geomagnetic and cosmic ray flux data along with rainfall and temperature data for almost five solar cycles. We provide evidence of significant influence of solar variability on climate. Specifically, we demonstrate…

大气与海洋物理 · 物理学 2013-12-03 Badruddin , O. P. M. Aslam , M. Singh

We analyze fluctuations of the solar neutrino flux using data from the Homestake, GALLEX, GNO, SAGE and Super Kamiokande experiments. Spectral analysis and direct quantitative estimations show that the most stable variation of the solar…

高能物理 - 唯象学 · 物理学 2007-05-23 R. N. Ikhsanov , Yu. N. Gnedin , E. V. Miletsky

The Sun is the major source of heat and light in our solar system. The solar cycle is the 11-year cycle of solar activity that can be determined by the rise and fall in the numbers and surface area of sunspots. Solar activity is associated…

太阳与恒星天体物理 · 物理学 2018-05-01 Ryan Manuel D. Guido

Measurements of the beta decay rates of nuclei have revealed annual periodicities with approximately the same relative amplitude even though the half-lives range over nine orders of magnitude. Here we show that this can be explained if the…

高能物理 - 唯象学 · 物理学 2016-09-12 M. J. Mueterthies , D. E. Krause , A. Longman , V. E. Barnes , E. Fischbach

Nuclear reaction rates are a fundamental yet uncertain ingredient in stellar evolution models. The astrophysical S-factor pertaining to the initial reaction in the proton-proton chain is uncertain at the 1% level, which contributes a…

太阳与恒星天体物理 · 物理学 2022-10-05 Earl Patrick Bellinger , Jørgen Christensen-Dalsgaard

We have used Simple Denoising Algorithm using Wavelet Transform on 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…

高能物理 - 唯象学 · 物理学 2007-05-23 Koushik Ghosh , Probhas Raychaudhuri

The Integrated Science Investigation of the Sun instrument suite onboard NASA's Parker Solar Probe mission continues to measure solar energetic particles and cosmic rays closer to the Sun than ever before. Here, we present the first…

We study the prospects for measuring the low-energy components of the solar neutrino flux in future direct dark matter detection experiments. We show that for a depletion of $^{136}$Xe by a factor of 100 relative to its natural abundance,…

太阳与恒星天体物理 · 物理学 2019-02-20 Jayden L. Newstead , Louis E. Strigari , Rafael F. Lang

The recently released spacecraft potential measured by the RPW instrument on-board Solar Orbiter has been used to estimate the solar wind electron density in the inner heliosphere. Solar-wind electron density measured during June 2020 has…

Bruehl & Villarroel (2025) reported a correlation (p = 0.008, 2.6 sigma) between atmospheric nuclear weapon tests and photographic plate transient detection rates in the Palomar Observatory Sky Survey (POSS-I) archive, independently…

天体物理仪器与方法 · 物理学 2026-04-08 Kevin Cann

In the last decade, the photospheric solar metallicity as determined from spectroscopy experienced a remarkable downward revision. Part of this effect can be attributed to an improvement of atomic data and the inclusion of NLTE…

太阳与恒星天体物理 · 物理学 2015-05-18 Elisabetta Caffau , Hans-Günter Ludwig , Matthias Steffen , Bernd Freytag , Piercarlo Bonifacio