Effects of Heavy-Element Settling on Solar Neutrino Fluxes and Interior Structure

2018 ◽  
pp. 69-76
Author(s):  
Charles R. Proffitt
Keyword(s):  
Solar Neutrino ◽  
Heavy Element ◽  
Interior Structure ◽  
Neutrino Fluxes

scholarly journals Updated solar neutrino fluxes with new heavy element abundances

2020 ◽  
Vol 19 ◽  
pp. 66
Author(s):  
G. I. Karathanou ◽  
V. Tsikoudi ◽  
T. S. Kosmas
Keyword(s):  
Solar Neutrino ◽  
Heavy Element ◽  
Convection Zone ◽  
Reaction Rates ◽  
Extensive Study ◽  
Element Abundances ◽  
Solar Structure ◽  
Solar Evolution ◽  
Microphysical Parameters ◽  
Neutrino Fluxes

In the present work we carry out an extensive study of the solar structure and solar evolution through the use of the TYCHO 6.92 code, which includes a variety of programs and subroutines. In this code we incorporate the most updated microphysical parameters such as screening, recent experimental measurements of the astrophysical factors-S (LUNA), several updated, recently measured, heavy element abundances, etc., and created new models describing crucial phenomena of the solar structure and solar evolution. We used this code to calculate and update nuclear reaction rates, solar neutrino fluxes, solar quantities which characterize the internal solar structure such as temperature, pressure, density, luminosity, heavy element abundances (4He, 12C, 14N, 16O, etc.) as well as sound speed profile and depth of the convection zone.

scholarly journals Volcanology and new geophysics: reality and prospects for example Yellowstone volcano

2019 ◽  
pp. 25-35
Author(s):  
O. B. Khavroshkin ◽  
S. A. Fedotov ◽  
V. V. Tsyplakov ◽  
A. N. Boiko
Keyword(s):  
Solar System ◽  
Detailed Analysis ◽  
Volcanic Activity ◽  
Solar Neutrino ◽  
Strong Influence ◽  
Open Systems ◽  
Neutrino Flux ◽  
Solar Neutrino Flux ◽  
New Geophysics ◽  
Neutrino Fluxes

The dynamic portrait of Yellowstone volcano activity in the form of detailed analysis of key parameters and in real time is presented. Some preliminary findings show that active volcanoes are energetically open systems with a strong influence of the external astrophysical component, primarily solar muon and neutrino fluxes. This should be taken into account when predicting their activity. The astrophysical component of activity may be one of the main mechanisms synchronizing the state of supervolcanoes. The astrophysical component of volcanic activity can exist in other volcanoes of the terrestrial planets of the Solar system, which also experience the synchronizing effects of the solar neutrino flux, that is, the planets of the Solar system can be found to have common rhythms of volcanic activity.

scholarly journals Solar Neutrinos Spectroscopy with Borexino Phase-II

2018 ◽  
Author(s):  
Lino Miramonti ◽  
M. Agostini ◽  
K. Altenmueller ◽  
S. Appel ◽  
V. Atroshchenko ◽  
...  
Keyword(s):  
Phase Ii ◽  
Solar Neutrino ◽  
Wide Band ◽  
Solar Neutrinos ◽  
Low Energy ◽  
Fusion Reactions ◽  
Oscillation Mechanism ◽  
Upper Limits ◽  
Flux Measurements ◽  
Neutrino Fluxes

Solar neutrinos have played a central role in the discovery of the neutrino oscillation mechanism. They still are proving to be a unique tool to help investigate the fusion reactions that power stars and further probe basic neutrino properties. The Borexino neutrino observatory has been operationally acquiring data at Laboratori Nazionali del Gran Sasso in Italy since 2007. Its main goal is the real-time study of low energy neutrinos (solar or originated elsewhere, such as geo-neutrinos). The latest analysis of experimental data, taken during the so-called Borexino Phase-II (2011-present), will be showcased in this talk - yielding new high-precision, simultaneous wide band flux measurements of the four main solar neutrino components belonging to the "pp" fusion chain (pp, pep, 7Be, 8B), as well as upper limits on the remaining two solar neutrino fluxes (CNO and hep).

SOLAR MODELS: AN HISTORICAL OVERVIEW

2003 ◽  
Vol 18 (22) ◽  
pp. 3761-3776 ◽  
Author(s):  
JOHN N. BAHCALL
Keyword(s):  
Solar Neutrino ◽  
Neutrino Flux ◽  
New Physics ◽  
Solar Model ◽  
Historical Overview ◽  
Standard Solar Model ◽  
Solar Luminosity ◽  
Consensus View ◽  
Neutrino Fluxes ◽  
Neutrino Experiments

I will summarize in four slides the 40 years of development of the standard solar model that is used to predict solar neutrino fluxes and then describe the current uncertainties in the predictions. I will dispel the misconception that the p-p neutrino flux is determined by the solar luminosity and present a related formula that gives, in terms of the p-p and 7 Be neutrino fluxes, the ratio of the rates of the two primary ways of terminating the p-p fusion chain. I will also attempt to explain why it took so long, about three and a half decades, to reach a consensus view that new physics is being learned from solar neutrino experiments. Finally, I close with a personal confession and some personal remarks.

scholarly journals MeV Neutrino Sources: The Sun and the Supernovae

2005 ◽  
Vol 13 ◽  
pp. 9-12
Author(s):  
Sylvaine Turck-Chièze
Keyword(s):  
Solar Neutrino ◽  
Neutrino Oscillations ◽  
Main Role ◽  
The Sun ◽  
Hydrodynamic Processes ◽  
Neutrino Fluxes

AbstractThe two sources of MeV neutrinos, the Sun and the Supernovae are very interesting to study nowadays. Seismology aboard SoHO has properly constrained the solar emitted neutrino fluxes and consequently contributes to an unambiguous evidence of the solar neutrino oscillations. The main role of seismology stays nevertheless the description of the magneto-hydrodynamic processes and this progress provokes a renewal of the stellar discipline. Important results are noticed these three years, for the Sun. Future will be richer implying a large number of stars with an evident impact on supernovae and solar neutrino properties.

THE SOLAR NEUTRINO PROBLEM AND BOUNDS ON SOLAR NEUTRINO FLUXES

1995 ◽  
Vol 10 (19) ◽  
pp. 1331-1349 ◽  
Author(s):  
WAIKWOK KWONG ◽  
S.P. ROSEN
Keyword(s):  
Lower Bound ◽  
Solar Neutrino ◽  
Solar Physics ◽  
Current Status ◽  
Empirical Methods ◽  
Solar Neutrino Problem ◽  
Neutrino Spectrum ◽  
Theoretical Predictions ◽  
Neutrino Fluxes ◽  
Semi Empirical

We review the current status of the solar neutrino problem. A survey of the experiments and their results are given, and solar physics crucial to the understanding of these results are discussed. Semi-empirical methods are used to derive bounds on the fluxes of the three most important components (pp, 7Be and 8B) of the solar neutrino spectrum. The 8B neutrinos are directly measured to be about half of the theoretical prediction. Relative to their theoretical predictions, we find the 7Be neutrinos to be highly suppressed and the pp neutrinos not suppressed. We are also able to derive a lower bound on the pp flux.

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