Diffusive convective overshoot in core He-burning intermediate mass stars
نویسندگان
چکیده
منابع مشابه
Diffusive convective overshoot in core He - burning intermediate mass stars . I : the LMC metallicity
We present detailed evolutionary calculations focused on the evolution of intermediate mass stars with 3M ⊙ ≤ M ≤ 9M ⊙ of metallicity typical of the Large Magellanic Cloud (LMC), i.e. Z = 0.008. We compare carefully the models calculated by adopting a diffusive scheme for chemical mixing, in which nuclear burning and mixing are self-consistently coupled, while the eddy velocities beyond the for...
متن کاملHot Bottom Burning in Intermediate Mass Stars
We discuss nucleosynthesis within intermediatemass stars by consideringa 6M model with Z = 0:02 as a typical example. The emphasis is on the AGB phase of evolution, with particular reference to nuclear burning in the bottom of the convective envelope. We nd strong CN cycling, with substantial Al production. Further we connrm previous calculations of lithium production, and show that this model ...
متن کاملRapidly rotating stars with either H burning or He burning core
We have succeeded in constructing structures of realistic models for rapidly rotating inhomogeneous stars in the nuclear burning stages. The nuclear reaction networks both for CNO cycle and for helium burning have been successfully included in the 2D numerical code. Concerning the equation of state and the opacity, we have used the same ones as used in calculations of spherical stellar structur...
متن کاملThe evolution of AGB stars with convective overshoot
The influence of extended convective mixing (overshoot) on asymptotic giant branch stellar evolution is investigated in detail. The extended mixing is treated timedependently, and the efficiency declines exponentially with the geometric distance from the convective boundary. It has been considered at all convective boundaries, including the He-flash convection zone in the intershell region whic...
متن کاملTime dependent mixing in He - burning cores : the case of NGC 1866
We examine the convective core helium burning phase of intermediate mass stars, and investigate the role of coupling of nuclear burning and mixing on the extension and duration of the blue loop phase. We compare the theoretical scenario with the distribution of stars in the colour-magnitude (CM) diagram of the Large Magellanic Cloud (LMC) cluster NGC1866, whose largely populated clump of He-bur...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2005
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361:20052668