Solar mass loss, solar lithium, and solar oscillations

Conference · Thu Sep 01 04:00:00 EDT 1994

OSTI ID:10182171

Cox, A N; Guzik, J A ^[1]

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1. Los Alamos National Lab., NM (United States). Los Alamos Astrophysics

Swenson and Faulkner, and Boothroyd et al. investigated the possibility that early main-sequence mass loss via a stronger early solar wind could be responsible for the observed solar lithium and beryllium depletion. This depletion requires a total mass loss of {approx}0.1 M{sub {circle_dot}}, nearly independent of the mass loss timescale. The authors have calculated the evolution and oscillation frequencies of solar models including helium and heavier element diffusion, and such early solar mass loss. For models with gradual early mass loss (during {approx}1 Gyr), the early mass loss phase decreases the total amount of helium and heavier elements diffused from the convection zone, and the extent of the diffusion-produced composition gradient just below the convection zone, deteriorating the agreement with observed frequencies for intermediate {ell} modes. The mass loss phase must be confined to {approx}0.2 Gyr or less to solve simultaneously the solar Li/Be problem and avoid discrepancies with solar oscillation frequencies.

• Research Organization: Los Alamos National Lab., NM (United States)
• Sponsoring Organization: Department of Defense, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 10182171
• Report Number(s): LA-UR--94-2741; CONF-9405222--1; ON: DE94018262
• Country of Publication: United States
• Language: English

Related Subjects

661300
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CHEMICAL COMPOSITION
MASS TRANSFER
OTHER ASPECTS OF PHYSICAL SCIENCE
SOLAR WIND
STAR EVOLUTION
STAR MODELS
SUN