Calibrating the Mixing‐Length Parameter for a Red Giant Envelope | Zendy

S. M. Asida | Zendy

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Calibrating the Mixing‐Length Parameter for a Red Giant Envelope

Author(s) -

S. M. Asida

Publication year - 2000

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/308211

Subject(s) - mixing (physics) , envelope (radar) , physics , red giant branch , metallicity , luminosity , mixing length model , convection , astrophysics , statistical physics , mechanics , galaxy , computer science , telecommunications , radar , quantum mechanics

Two-dimensional hydrodynamical simulations were made to calibrate the mixinglength parameter for modeling red giant's convective envelope. As was brieflyreported in Asida & Tuchman (97), a comparison of simulations starting withmodels integrated with different values of the mixing length parameter, hasbeen made. In this paper more results are presented, including tests of thespatial 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 ared giant of mass 1.2 solar-mass, core mass of 0.96 solar-mass, luminosity of200 solar-luminosities, and metallicity Z=0.001.Comment: 18 pages, 1 table, 13 figures. Accepted for publication in Ap.

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