CaltechAUTHORS
  A Caltech Library Service

Solar seismology. I. The stability of the solar p-modes

Goldreich, Peter and Keeley, Douglas A. (1977) Solar seismology. I. The stability of the solar p-modes. Astrophysical Journal, 211 (1). pp. 934-942. ISSN 0004-637X. http://resolver.caltech.edu/CaltechAUTHORS:20130306-075048182

[img]
Preview
PDF - Published Version
See Usage Policy.

1060Kb

Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:20130306-075048182

Abstract

We investigate the stability of the radial p-modes of the Sun by computing nonadiabatic eigen-values and e1genfunctions for a solar envelope model which extends from an inner radius r ≈ 0.3 R_☉ out to an optical depth r ≈ 3 x 10^(-4). Our calculations take into account in a crude fashion the response of the convective flux to the oscillation. The dynamical effect of turbulence in the convection zone is parametrized in terms of a turbulent shear viscosity. The results of our calculations are as follows. If damping by turbulent viscosity is neglected, all modes with penriods longer than 6 minutes are unstable. The familiar K-mechanism, which operates in the H ionization-H^- opacity region, is the dominant source of driving of the oscillations. Modes with periods shorter than 6 minutes are stabilized by radiative damping in the solar atmosphere. When turbulent dissipation of pulsational energy is included, all modes are predicted to be stable. However, the margin of stability is very small. In view of the large uncertainty that must be assigned to our estimate of turbulent damping, we conclude that theoretical calculations cannot unequivocally resolve the question of the stability of the solar p-modes.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1086/155005DOIUNSPECIFIED
http://adsabs.harvard.edu/doi/10.1086/155005ADSUNSPECIFIED
Additional Information:© 1977 American Astronomical Society. Received 1976 April 12. This research was supported by NASA grant NGL-05-002-003 and NSF grants MPS 72-05045 A02, GU-3162 and GPX-32337 X1.
Funders:
Funding AgencyGrant Number
NASANGL-05-002-003
NSFMPS 72-05045 A02
NSFGU-3162
NSFGPX-32337 X1
Subject Keywords:stars: pulsation, Sun: atmospheric motions, Sun: interior
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Caltech Division of Geological and Planetary Sciences2731
Record Number:CaltechAUTHORS:20130306-075048182
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20130306-075048182
Official Citation:Solar seismology. I. The stability of the solar p-modes Goldreich, P.; Keeley, D. A. Astrophysical Journal, Part 1, vol. 211, Feb. 1, 1977, p. 934-942.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:37330
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:06 Mar 2013 16:58
Last Modified:13 Feb 2019 18:05

Repository Staff Only: item control page