The expressions for the turbulent pressure, equation of state and thermodynamic quantities taking account of turbulent pressure are derived in the framework of the mixing-length theory of convection. The numerical computations indicate that the turbulent pressure in the region close to the surface of a red giant or an AGE star can reach a value of 30-40 percent of the total pressure. A comparison of the evolution of a star with 7M. from the zero-age main sequence to the AGE stage adopting turbulent pressure with that of the neglected turbulent pressure shows that the effect of turbulent pressure on the internal structure and evolution in the phase from the He-core burning stage to the AGE stage is significant. A similar investigation for the star of 2.8M. shows that the effect of turbulent pressure on the internal structure in the same evolutionary phase is small. However, the effect of turbulent pressure on the evolutional track in the AGE phase is obvious.
Jiang SY,Huang RQ. The effect of turbulent pressure on the red giants and AGE stars .1. On the internal structure and evolution[J]. ASTRONOMY & ASTROPHYSICS,1997,317(1):114-120.
APA
Jiang SY,&Huang RQ.(1997).The effect of turbulent pressure on the red giants and AGE stars .1. On the internal structure and evolution.ASTRONOMY & ASTROPHYSICS,317(1),114-120.
MLA
Jiang SY,et al."The effect of turbulent pressure on the red giants and AGE stars .1. On the internal structure and evolution".ASTRONOMY & ASTROPHYSICS 317.1(1997):114-120.
; Huang RQ(黄润乾)
修改评论