Sensitivity of nonradial p mode eigenfrequencies to solar envelope structure

Journal Article · Thu Dec 01 04:00:00 EST 1977 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/155705· OSTI ID:5331684

Ulrich, R K; Rhodes, Jr, E J

Eigenfrequencies are calculated for nonradial p mode oscillations in the Sun. These frequencies are shown to depend on the adiabat of the solar convective envelope. The frequency dependence is greatest for the p/sub 2/ and p/sub 3/ modes described by spherical harmonics with l=500 to 1000. The solar envelope model includes a realistic representation of the chromosphere out to the base of the corona. For the chromospheric model of Vernazza, Avrett, and Loeser chromospheric modes with a distinct locus of eigenfrequencies exist near ..omega..=0.026 s/sup -1/. The actual frequencies of these eigenmodes depend on the thickness of the chromosphere. Because of the difference in the dependence of ..omega.. on l for the chromospheric modes as compared to the p modes, the two types of modes can be distinguished observationally. If detected, the chromospheric modes would provide a good way of determining the thickness of the chromosphere.

• Research Organization: Astronomy Department, University of California at Los Angeles
• OSTI ID: 5331684
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 218:2; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640104* -- Astrophysics & Cosmology-- Solar Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ADIABATIC PROCESSES
ATMOSPHERES
CHROMOSPHERE
CONVECTION
EIGENFREQUENCY
ENERGY TRANSFER
ENTROPY
HEAT TRANSFER
MATHEMATICAL MODELS
OSCILLATION MODES
OSCILLATIONS
PHYSICAL PROPERTIES
SOLAR ATMOSPHERE
SPHERICAL HARMONICS
STAR MODELS
STARS
SUN
THERMODYNAMIC PROPERTIES