Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...413..778a&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 413, no. 2, p. 778-785.
Astronomy and Astrophysics
Astronomy
7
Convective Flow, Solar Convection (Astronomy), Stellar Envelopes, Stellar Structure, Eigenvectors, Mixing Length Flow Theory, Stellar Models
Scientific paper
The extent of overshoot from stellar convection zones into the adjoining stable layers has been recognized to have a nonnegligible influence on evolutionary tracks of stars. Recently, Stothers and Chin (1992) have carried out a detailed model-independent analysis of substantial body of observational data to conclude that the maximum permissible overshoot is 0.2 times the local pressure scale height. In the present work a realistic solar convection zone model is constructed by employing a nonlocal equation for the velocity of convective elements and by including dissipative effects in the calculations. The convection model approach and the analysis of linear eigenmodes are combined to estimate the penetration depths below the base of the convection zone and into the overlying solar atmosphere. It is demonstrated that for an arbitrary extent of overshoot into the underlying stable region, it may not be possible to find a combination of linear modes capable of reproducing the model convective flux profile over the overshoot layers. The acceptable overshoot distance below the base of the convection zone turns out to be 0.2H(p) or less with a probable value of 0.1H(p), which appears to be consistent with helioseismological data.
Antia H. M.
Chitre S. M.
No associations
LandOfFree
Penetration at the base of solar convection zone 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 Penetration at the base of solar convection zone, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Penetration at the base of solar convection zone will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1491312