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Helioseismology, solar models and solar neutrinos  [PDF]
G. Fiorentini,B. Ricci
Physics , 1999, DOI: 10.1016/S0920-5632(99)00864-6
Abstract: We review recent advances concerning helioseismology, solar models and solar neutrinos. Particularly we shall address the following points: i) helioseismic tests of recent SSMs; ii)the accuracy of the helioseismic determination of the sound speed near the solar center; iii)predictions of neutrino fluxes based on helioseismology, (almost) independent of SSMs; iv)helioseismic tests of exotic solar models.
Solar Models and Solar Neutrinos: Current Status  [PDF]
John N. Bahcall
Physics , 2004, DOI: 10.1088/0031-8949/2005/T121/006
Abstract: I provide a summary of the current theoretical knowledge of solar neutrino fluxes as derived from precise solar models.
Status of Solar Models  [PDF]
John N. Bahcall,Marc H. Pinsonneault
Physics , 1996,
Abstract: The neutrino fluxes calculated from 14 standard solar models published recently in refereed journals are inconsistent with the results of the 4 pioneering solar neutrino experiments if nothing happens to the neutrinos after they are created in the solar interior. The sound speeds calculated from standard solar models are in excellent agreement with helioseismological measurements of sound speeds. Some statements made by Dar at Neutrino 96 are answered here.
Solar Models with Revised Abundance  [PDF]
Shaolan Bi,Tanda Li,Linghuai Li,Wuming Yang
Physics , 2011, DOI: 10.1088/2041-8205/731/2/L42
Abstract: We present new solar models in which we use the latest low abundances and we further include the effects of rotation, magnetic fields and extra-mixing processes. We assume that the extra-element mixing can be treated as a diffusion process, with the diffusion coefficient depending mainly on the solar internal configuration of rotation and magnetic fields. We find that such models can well reproduce the observed solar rotation profile in the radiative region. Furthermore the proposed models can match the seismic constraints better than the standard solar models, also when these include the latest abundances, but neglect the effects of rotation and magnetic fields.
Are Standard Solar Models Reliable?  [PDF]
John N. Bahcall,M. H. Pinsonneault,Sarbani Basu,J. Christensen-Dalsgaard
Physics , 1996, DOI: 10.1103/PhysRevLett.78.171
Abstract: The sound speeds of solar models that include element diffusion agree with helioseismological measurements to a rms discrepancy of better than 0.2% throughout almost the entire sun. Models that do not include diffusion, or in which the interior of the sun is assumed to be significantly mixed, are effectively ruled out by helioseismology. Standard solar models predict the measured properties of the sun more accurately than is required for applications involving solar neutrinos.
Solar models and neutrino deficit  [PDF]
G. Conforto,C. Grimani,F. Martelli,F. Vetrano
Physics , 1998,
Abstract: 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 differences large enough to render energy-independent the depletion of the solar nu(e) flux. It is concluded that the data are consistent with this hypothesis and that an energy-dependence of the solar neutrino deficit must be regarded as an attractive possibility but not as a compelling reality.
Solar radiation models - review  [PDF]
M. Jamil Ahmad, G.N. Tiwari
International Journal of Energy and Environment , 2010,
Abstract: In the design and study of solar energy, information on solar radiation and its components at a given location is very essential. Solar radiation data are required by solar engineers, architects, agriculturists and hydrologists for many applications such as solar heating, cooking, drying and interior illumination of buildings. For this purpose, in the past, several empirical correlations have been developed in order to estimate the solar radiation around the world. The main objective of this study is to review the global solar radiation models available in the literature. There are several formulae which relate global radiation to other climatic parameters such as sunshine hours, relative humidity and maximum temperature. The most commonly used parameter for estimating global solar radiation is sunshine duration. Sunshine duration can be easily and reliably measured and data are widely available.
Dynamo Models of the Solar Cycle
Paul Charbonneau
Living Reviews in Solar Physics , 2010,
Abstract: This paper reviews recent advances and current debates in modeling the solar cycle as a hydromagnetic dynamo process. Emphasis is placed on (relatively) simple dynamo models that are nonetheless detailed enough to be comparable to solar cycle observations. After a brief overview of the dynamo problem and of key observational constraints, we begin by reviewing the various magnetic field regeneration mechanisms that have been proposed in the solar context. We move on to a presentation and critical discussion of extant solar cycle models based on these mechanisms. We then turn to the origin and consequences of fluctuations in these models, including amplitude and parity modulation, chaotic behavior, intermittency, and predictability. The paper concludes with a discussion of our current state of ignorance regarding various key questions relating to the explanatory framework offered by dynamo models of the solar cycle.
Solar neutrinos (almost) without standard solar models  [PDF]
G. Fiorentini,B. Ricci
Physics , 1995,
Abstract: We extract information on the fluxes of Be and CNO neutrinos directly from solar neutrino experiments, with minimal assumptions about solar models. Next we compare these results with solar models, both standard and non standard ones. Finally we discuss the expectations for Borexino, both in the case of standard and non standard neutrinos.
Dynamo Models of the Solar Cycle
Charbonneau Paul
Living Reviews in Solar Physics , 2005,
Abstract: This paper reviews recent advances and current debates in modeling the solar cycle as a hydromagnetic dynamo process. Emphasis is placed on (relatively) simple dynamo models that are nonetheless detailed enough to be comparable to solar cycle observations. After a brief overview of the dynamo problem and of key observational constraints, we begin by reviewing the various magnetic field regeneration mechanisms that have been proposed in the solar context. We move on to a presentation and critical discussion of extant solar cycle models based on these mechanisms. We then turn to the origin of fluctuations in these models, including amplitude and parity modulation, chaotic behavior, and intermittency. The paper concludes with a discussion of our current state of ignorance regarding various key questions, the most pressing perhaps being the identification of the physical mechanism(s) responsible for the generation of the Sun's poloidal magnetic field component.
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