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Further improvements of a new model for turbulent convection in starsThe effects of including a variable molecular weight and of using the newest opacities of Rogers and Iglesias (1991) as inputs to a recent model by Canuto and Mazzitelli (1991) for stellar turbulent convection are studied. Solar evolutionary tracks are used to conclude that the the original model for turbulence with mixing length Lambda = z, Giuli's variable Q unequal to 1 and the new opacities yields a fit to solar T(eff) within 0.5 percent. A formulation of Lambda is proposed that extends the purely nonlocal Lambda = z expression to include local effects. A new expression for Lambda is obtained which generalizes both the mixing length theory (MLT) phenomenological expression for Lambda as well as the model Lambda = z. It is argued that the MLT should now be abandoned.
Document ID
Document Type
Reprint (Version printed in journal)
External Source(s)
Canuto, V. M. (NASA Goddard Institute for Space Studies New York, United States)
Mazzitelli, I. (CNR Istituto di Astrofisica Spaziale, Frascati, Italy)
Date Acquired
August 15, 2013
Publication Date
April 20, 1992
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 389
ISSN: 0004-637X
Subject Category
Distribution Limits