Solar oscillation frequency and solar neutrino predictions

Conference · Thu Jul 05 04:00:00 EDT 1990

OSTI ID:7060014

Cox, A N

The light and velocity variations of the Sun and solar-like stars are unique among intrinsic variable stars. Unlike all other standard classes, such as Cepheids, B stars, and white dwarfs, the pulsation driving is caused by coupling with the acoustic noise in the upper convection zone. Each global pulsation mode is just another degree of freedom for the turbulent convection, and energy is shared equally between these g{sup {minus}}-modes and the solar oscillation modes. This driving and damping, together with the normal stellar pulsation mechanisms produce extremely low amplitude solar oscillations. Actually, the surface layer radiative damping is strong, and the varying oscillation mode amplitudes manifest the stochastic convection driving and the steady damping. Thus stability calculations for solar-like pulsations are difficult and mostly inconclusive, but calculations of pulsation periods are as straightforward as for all the other classes of intrinsic variable stars. The issue that is important for the Sun is its internal structure, because the mass, radius, and luminosity are extremely well known. Conventionally, we need the pulsation constants for each of millions of modes. Unknown parameters for constructing solar models are the composition and its material pressure, energy, and opacity, as well as the convection mixing length. We treat the nuclear energy and neutrino production formulas as sufficiently well known. The presence of weakly interacting massive particles (WIMPs) orbiting the solar center affects the predicted oscillation frequencies so that they do not agree with observations as well as those for models without WIMPs. 34 refs., 4 figs.

• Research Organization: Los Alamos National Lab., NM (USA)
• Sponsoring Organization: DOE/MA
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 7060014
• Report Number(s): LA-UR-90-2370; CONF-9005249--1; ON: DE90014918
• Country of Publication: United States
• Language: English

Related Subjects

640102 -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
640104* -- Astrophysics & Cosmology-- Solar Phenomena
645102 -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ELEMENTARY PARTICLES
EQUATIONS
EQUATIONS OF STATE
FERMIONS
FLUID MECHANICS
FREQUENCY DEPENDENCE
HYDRODYNAMICS
LEPTONS
MAGNETOHYDRODYNAMICS
MAIN SEQUENCE STARS
MASSLESS PARTICLES
MATHEMATICAL MODELS
MECHANICS
NEUTRINOS
OSCILLATIONS
PULSATIONS
RADIATIONS
SOLAR NEUTRINOS
SOLAR PARTICLES
SOLAR RADIATION
STAR MODELS
STARS
STELLAR RADIATION
SUN