1999/07/30 by S. M. Asida · 15 citations
Physics and Astronomy · #Astronomy and Astrophysical Research #Convection #Envelope (radar) #Luminosity #Metallicity #Mixing (physics) #Red giant #Red-giant branch #Solar and Space Plasma Dynamics #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1086/308211
published in The Astrophysical Journal 528(2), 896-906 (IOP Publishing) · 18 pages, 1 table, 13 figures. Accepted for publication in Ap.J
arxiv created 1999/07/30 · openalex publication_date 2000/01/10 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Two-dimensional hydrodynamical simulations were made to calibrate the mixing-length parameter for modeling red giants' convective envelopes. As was briefly reported in a recent paper by Asida & Tuchman, a comparison of simulations starting with models integrated with different values of the mixing-length parameter has been made. In this paper more results are presented, including tests of the spatial resolution and large-eddy simulation terms used by the numerical code. The consistent value of the mixing-length parameter was found to be 1.4 for a red giant of mass 1.2 M ☉ , core mass 0.96 M ☉ , luminosity 200 L ☉ , and metallicity Z = 0.001.