Overshooting in stars: Five old fallacies and a new model

被引:30
作者
Canuto, VM
机构
[1] NASA, Goddard Institute for Space Studies, New York, NY 10025
关键词
convection; stars; kinematics; turbulence;
D O I
10.1086/310955
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
First, I discuss five fallacies of previous theoretical attempts to quantify overshooting in stars. I then suggest that the only reliable procedure is to solve the five dynamic equations for convective flux, kinetic and potential energy, turbulent pressure and dissipation rate of kinetic energy, plus the mean temperature equation. Finally, I discuss a recent solution of the new model that agrees with the latest helioseismological OV data and suggest that the same data be used to check the validity of the Schwarzschild criterion.
引用
收藏
页码:L71 / L74
页数:4
相关论文
共 22 条
[1]   NEW STRONG EVIDENCE FOR THE IMPORTANCE OF CONVECTIVE OVERSHOOTING IN INTERMEDIATE-MASS STARS [J].
ANDERSEN, J ;
NORDSTROM, B ;
CLAUSEN, JV .
ASTROPHYSICAL JOURNAL, 1990, 363 (02) :L33-L36
[2]  
[Anonymous], 1971, THEORY HOMOGENEOUS T
[3]   SOLAR PULSATIONAL STABILITY .1. PULSATION-MODE THERMODYNAMICS [J].
BALMFORTH, NJ .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1992, 255 (04) :603-631
[4]   HELIOSEISMIC MEASUREMENT OF THE EXTENT OF OVERSHOOT BELOW THE SOLAR CONVECTION ZONE [J].
BASU, S ;
ANTIA, HM ;
NARASIMHA, D .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1994, 267 (01) :209-224
[5]   Seismology of the base of the solar convection zone [J].
Basu, S .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1997, 288 (03) :572-584
[6]   A dynamical model for turbulence .4. Buoyancy-driven flows [J].
Canuto, VM ;
Dubovikov, MS ;
Dienstfrey, A .
PHYSICS OF FLUIDS, 1997, 9 (07) :2118-2131
[7]   Overshooting: Mixing length yields divergent results [J].
Canuto, VM ;
Dubovikov, M .
ASTROPHYSICAL JOURNAL, 1997, 484 (02) :L161-L163
[8]   TURBULENT CONVECTION WITH OVERSHOOTING - REYNOLDS STRESS APPROACH [J].
CANUTO, VM .
ASTROPHYSICAL JOURNAL, 1992, 392 (01) :218-232
[9]   A dynamical model for turbulence .1. General formalism [J].
Canuto, VM ;
Dubovikov, MS .
PHYSICS OF FLUIDS, 1996, 8 (02) :571-586
[10]  
CANUTO VM, 1998, IN PRESS APJ