Effects of opacity and equation of state on solar structure and oscillations

Details Effects of opacity and equation of state on solar structure and oscillations Effects of opacity and equation of state on solar structure and oscillations

Nov 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...381..333g&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 381, Nov. 1, 1991, p. 333-340.

Statistics

Computation

31

Solar Interior, Solar Oscillations, Stellar Structure, Computational Astrophysics, Equations Of State, Opacity, Solar Temperature, Stellar Models

Scientific paper

The evolution and p-mode oscillation frequencies of several solar models are presented, highlighting the effects of uncertainties in the opacity and equation of state. The Dappen, Mihalas, Hummer, and Mihalas ('MHD') equation of state tables are incorporated into the evolution and oscillation calculations, and the results are compared with those of models calculated using the analytical Iben equation of state. The nonadiabatic low-degree p-mode oscillation frequencies derived from models using either of these equations of state agree with observations to within a few microhertz. The MHD equation of state, with more detailed treatment of envelope ionization regions, improves agreement with observations for p-modes of degree l = 40-300. For higher degree p-modes, observational uncertainties make it difficult to determine how much improvement the MHD equation of state provides over the analytical Iben procedure. Calculated p-mode oscillation frequencies favor the higher Ross-Aller opacities, which include molecular effects and more iron lines, over the older Cox-Tabor opacities in the solar envelope at temperatures below 9000 K. Thus, solar oscillations can be effectively used to constrain opacities at the solar surface and below the convection zone.

Affiliated with

Also associated with

No associations

Rating

Effects of opacity and equation of state on solar structure and oscillations 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 Effects of opacity and equation of state on solar structure and oscillations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Effects of opacity and equation of state on solar structure and oscillations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1716771