The Standard Solar Model and beyond

Turck‐Chièze, S.

doi:10.1088/1742-6596/665/1/012078

Cited by 12 publications

(10 citation statements)

References 40 publications

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“…The code has up-to-date microscopic physics, and in particular uses the nuclear reaction rates from the NACRE Compilation [83]. This SSM predicts solar neutrino fluxes and helioseismic data that are consistent with other SSM models found in the literature [e.g., 26,84]. In relation to the properties of our standard solar model, this can be found in Lopes & Silk [85].…”

Section: Dark Matter and The Sunmentioning

confidence: 59%

Dark matter imprint onB8neutrino spectrum

Lopes

Silk

2019

Phys. Rev. D

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The next generation of solar neutrino detectors will provide a precision measure of the 8 B electron-neutrino spectrum in the energy range from 1-15 MeV. Although the neutrino spectrum emitted by 8 B β-decay reactions in the Sun's core is identical to the neutrino spectrum measured in the laboratory, due to vacuum and matter flavor oscillations, this spectrum will be very different from that measured on Earth by the different solar neutrino experiments. We study how the presence of dark matter (DM) in the Sun's core changes the shape of the 8 B electron-neutrino spectrum. These modifications are caused by local variations of the electronic density and the 8 B neutrino source, induced by local changes of the temperature, density and chemical composition. Particularly relevant are the shape changes at low and medium energy range (E ν ≤ 10 MeV), for which the experimental noise level is expected to be quite small. If such a distortion in the 8 Bν e spectrum were to be observed, this would strongly hint in favor of the existence of DM in the Sun's core. The 8 B electron-neutrino spectrum provides a complementary method to helioseismology and total neutrino fluxes for constraining the DM properties. In particular, we study the impact of light asymmetric DM on solar neutrino spectra. Accurate neutrino spectra measurements could help to determine whether light asymmetric DM exists in the Sun's core, since it has been recently advocated that this type of DM might resolve the solar abundance problem.

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Section: Dark Matter and The Sunmentioning

confidence: 59%

Dark matter imprint onB8neutrino spectrum

Lopes

Silk

2019

Phys. Rev. D

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“…The sound-speed profile in the solar core has also been useful, in what is referred to as the seismic solar model (SeSM) [60], to verify the reliability of the highly temperature-dependent (and thus opacity-dependent) nuclear reaction rates in reproducing the observed solar neutrino fluxes. In other words, both the helioseismic indicators and neutrino fluxes impose fairly strict constraints on the opacities and metal abundances (both of volatile and refractory elements) at different solar radii.…”

Section: Seismic Solar Modelmentioning

confidence: 99%

“…This critical situation is encouraging further developments and discussions that, in a similar manner to the solar neutrino problem, are expected to converge soon to a comprehensive solution. For instance, since the SSM is basically a static representation, there has been renewed interest in considering magnetic and dynamical effects such as rotation, elemental diffusion, and mixing and convection overshoot [60,67]. Nuclear fusion cross sections have also been critically evaluated pinpointing cases for which the current precision could be improved [68].…”

Section: Multidisciplinary Approachmentioning

confidence: 99%

Computation of Atomic Astrophysical Opacities

Mendoza

2018

Atoms

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Abstract:The revision of the standard Los Alamos opacities in the 1980-1990s by a group from the Lawrence Livermore National Laboratory (OPAL) and the Opacity Project (OP) consortium was an early example of collaborative big-data science, leading to reliable data deliverables (atomic databases, monochromatic opacities, mean opacities, and radiative accelerations) widely used since then to solve a variety of important astrophysical problems. Nowadays the precision of the OPAL and OP opacities, and even of new tables (OPLIB) by Los Alamos, is a recurrent topic in a hot debate involving stringent comparisons between theory, laboratory experiments, and solar and stellar observations in sophisticated research fields: the standard solar model (SSM), helio and asteroseismology, non-LTE 3D hydrodynamic photospheric modeling, nuclear reaction rates, solar neutrino observations, computational atomic physics, and plasma experiments. In this context, an unexpected downward revision of the solar photospheric metal abundances in 2005 spoiled a very precise agreement between the helioseismic indicators (the radius of the convection zone boundary, the sound-speed profile, and helium surface abundance) and SSM benchmarks, which could be somehow reestablished with a substantial opacity increase. Recent laboratory measurements of the iron opacity in physical conditions similar to the boundary of the solar convection zone have indeed predicted significant increases (30-400%), although new systematic improvements and comparisons of the computed tables have not yet been able to reproduce them. We give an overview of this controversy, and within the OP approach, discuss some of the theoretical shortcomings that could be impairing a more complete and accurate opacity accounting.

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“…beneath the convection zone base, and with a width of 0.04R . Using Sun's density profile based on the Standard Solar Model [41,42], the tachocline itself should contribute at the level ∼ 0.5% to the total angular momentum of the Sun, i.e. to the source of the LT field.…”

Section: Retrievable Information On the Interior Of The Sunmentioning

confidence: 99%

How to use the Sun–Earth Lagrange points for fundamental physics and navigation

et al. 2017

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We illustrate the proposal, nicknamed LAGRANGE, to use spacecraft, located at the Sun-Earth Lagrange points, as a physical reference frame. Performing time of flight measurements of electromagnetic signals traveling on closed paths between the points, we show that it would be possible: a) to refine gravitational time delay knowledge due both to the Sun and the Earth; b) to detect the gravito-magnetic frame dragging of the Sun, so deducing information about the interior of the star; c) to check the possible existence of a

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The Standard Solar Model and beyond

Cited by 12 publications

References 40 publications

Dark matter imprint onB8neutrino spectrum

Dark matter imprint onB8neutrino spectrum

Computation of Atomic Astrophysical Opacities

How to use the Sun–Earth Lagrange points for fundamental physics and navigation

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