The phase function for stellar acoustic oscillations. I - Theory

Details The phase function for stellar acoustic oscillations. I - Theory The phase function for stellar acoustic oscillations. I - Theory

Jul 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mnras.257...62c&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 257, no. 1, July 1, 1992, p. 62-88. Research supported

Statistics

Computation

30

Computational Astrophysics, P Waves, Solar Interior, Sound Waves, Stellar Models, Stellar Oscillations, Adiabatic Conditions, Asymptotic Properties, Convection, Helioseismology, Photosphere

Scientific paper

The influence of the upper layers of a star on p-mode frequencies can be described asymptotically by means of a phase function, which depends essentially only on the frequency of the mode. The extent to which the phase function may provide information about the superficial layers of a star is investigated. In particular, a linear relation between the phase-function differences and differences in equilibrium structure of the upper layers of two models is derived. This relation was tested by comparing with a normal solar model two modified models: a chemically homogeneous model and a model with a modified treatment of the superadiabatic gradient in the convection zone. In both cases the linear relation is satisfied with reasonable precision. This makes it possible to separate the contributions from different layers near the surface of the star to the phase-function differences, and hence to the differences in the mode frequencies. In general, a major contribution comes from the layers localized just beneath the photosphere; but the region around the second helium ionization zone may also make a significant contribution, which is characterized by a more rapid frequency dependence.

Affiliated with

Also associated with

No associations

Rating

The phase function for stellar acoustic oscillations. I - Theory does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The phase function for stellar acoustic oscillations. I - Theory, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The phase function for stellar acoustic oscillations. I - Theory will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1210235