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The four operating solar neutrino experiments confirm the hypothesis that the energy source for solar luminosity is hydrogen fusion. However, the measured rate for each of the four solar neutrino experiments differs significantly (by…

天体物理学 · 物理学 2015-06-24 John N. Bahcall

The Central Compact Object (CCO) in the Cassiopeia A supernova remnant is most likely a very young ($\approx 300$ yr) neutron star. If a previously reported decrease of its surface temperature by 4% in 10 years could be confirmed, it would…

高能天体物理现象 · 物理学 2018-09-19 B. Posselt , G. G. Pavlov

Gamma rays from a solar flare in Active Region 10039 on 23 July 2002 with the RHESSI spacecraft spectrometer indicate that the CNO cycle occurs at the solar surface, in electrical discharges along closed magnetic loops. At the two feet of…

天体物理学 · 物理学 2007-05-23 Michael Mozina , Hilton Ratcliffe , O. Manuel

We investigate the sensitivity of the solar model to changes in the nuclear reaction screening factors. We show that the sound speed profile as determined by helioseismology certainly rules out changes in the screening factors exceeding…

天体物理学 · 物理学 2008-11-26 A. Weiss , M. Flaskamp , V. N. Tsytovich

This article presents a power-spectrum analysis of 2,350 measurements of the $^{90}$Sr/$^{90}$Y decay process acquired over the interval 4 August 2002 to 6 February 2009 at the Lomonosov Moscow State University (LMSU). As we have found for…

太阳与恒星天体物理 · 物理学 2015-06-04 Peter A. Sturrock , Alexander G. Parkhomov , Ephraim Fischbach , Jere H. Jenkins

Experimental work with solar neutrinos has illuminated the properties of neutrinos and tested models of how the sun produces its energy. Three experiments continue to take data, and at least seven are in various stages of planning or…

核实验 · 物理学 2009-11-11 R. G. H. Robertson

The CAST (CERN Axion Solar Telescope) experiment at CERN searches for solar axions with energies in the keV range. It is possible that axions are produced in the core of the sun by the interaction of thermal photons with virtual photons of…

高能物理 - 实验 · 物理学 2007-05-23 Donghwa Kang

Theoretical aspects of a solar sail material degradation are presented when the solar electromagnetic and corpuscular forms of radiation were considered as sources of degradation. The analysis of the interaction of two components of solar…

空间物理 · 物理学 2024-10-29 Roman Ya. Kezerashvili

The DAMA experiment clearly observes a small oscillatory signal. The observed yearly modulation is in phase with the Earth's motion around the Sun. Recent reference [Vavra, 2014] suggested that the DAMA experiment observes a WIMP of much…

天体物理仪器与方法 · 物理学 2014-01-28 J. Va'vra

In this paper, we study the galactic cosmic ray (GCR) variations over the solar cycles 23 and 24, with measurements from the NASA's ACE/CRIS instrument and the ground-based neutron monitors (NMs). The results show that the maximum GCR…

太阳与恒星天体物理 · 物理学 2021-06-23 Shuai Fu , Xiaoping Zhang , Lingling Zhao , Yong Li

The influence of solar variability on climate is currently uncertain. Recent observations have indicated a possible mechanism via the influence of solar modulated cosmic rays on global cloud cover. Surprisingly the influence of solar…

大气与海洋物理 · 物理学 2011-09-06 Nigel D Marsh , Henrik Svensmark

Detecting the presence and characteristic scale of a signal is a common problem in data analysis. We develop a fast statistical test of the null hypothesis that a Fourier-like power spectrum is consistent with noise. The null hypothesis is…

太阳与恒星天体物理 · 物理学 2018-10-17 Keaton J. Bell , Saskia Hekker , James S. Kuszlewicz

Solar contamination, due to moonlight and atmospheric scattering of sunlight, can cause systematic errors in stellar radial velocity (RV) measurements that significantly detract from the ~10cm/s sensitivity required for the detection and…

The Sudbury Neutrino Observatory (SNO) is a water imaging Cherenkov detector. Its usage of 1000 metric tons of D$_{2}$O as target allows the SNO detector to make a solar-model independent test of the neutrino oscillation hypothesis by…

核实验 · 物理学 2019-08-14 A. W. P. Poon

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

高能天体物理现象 · 物理学 2016-06-03 G. de Wasseige

Negative ions have been detected in abundance in recent years by spacecraft across the solar system. These detections were, however, made by instruments not designed for this purpose and, as such, significant uncertainties remain regarding…

空间物理 · 物理学 2021-06-17 Ravindra T. Desai , Zeqi Zhang , Xinni Wu , Charles Lue

The relative abundance of deuterium (D) in the solar atmosphere is not known. D is not only destroyed in stars, it is also synthesized in the atmospheres of active stars (Prodanovic & Fields 2003). In several cases, production of D in the…

天体物理仪器与方法 · 物理学 2009-09-08 Frank Scherb

Borexino has been running since May 2007 at the LNGS with the primary goal of detecting solar neutrinos. The detector, a large, unsegmented liquid scintillator calorimeter characterized by unprecedented low levels of intrinsic…

The Electron, Proton and Alpha Monitor, EPAM, located at the L1 Position approximately 1-million miles from the earth in the direction of the sun, was designed to detect fluctuations in solar output through counting the numbers of various…