Abstract
Extra mixing of matter in stellar interiors at the boundaries of the convective cores of mainsequence stars is considered for the first time using the physical model of turbulent entrainment developed by Arnett and collaborators based on three-dimensional hydrodynamical simulations. The model takes into account the energy that goes into mixing the matter of the convective core and layers stable against convection located above the core. It is shown that the extent of the region of extra mixing expressed in units of the pressure scale height is not constant, and decreases as the star evolves along the main sequence. Adequate allowance for extra mixing at the boundaries of convective cores is necessary to clarify the relative importance of different mixing mechanisms in stellar interiors, as well as to determine stellar parameters using asteroseismlogy.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
A. Maeder and J.-C. Mermilliod, Astron. Astrophys. 93, 136 (1981).
G. Meylan and A. Maeder, Astron. Astrophys. 108, 148 (1982).
J.-C. Mermilliod and A. Maeder, Astron. Astrophys. 158, 45 (1986).
M. Briquet, C. Aerts, A. Baglin, et al., Astron. Astrophys. 527, 112 (2011).
A. Mazumdar, M. Briquet, M. Desmet and C. Aerts, Astron. Astrophys. 459, 589 (2006).
C. Aerts, M. Briquet, P. Degroote, et al., Astron. Astrophys. 534, 98 (2011).
C. Aerts, S. V. Marchenko, J. M. Matthews, et al., Astrophys. J. 642, 470 (2006).
M. Briquet, T. Morel, A. Thoul, et al., Mon. Not. R. Astron. Soc. 381, 1482 (2007).
M. Desmet, M. Briquet, A. Thoul, et al., Mon. Not. R. Astron. Soc. 396, 1460 (2009).
A. A. Pamyatnykh, G. Handler, and W. A. Dziembowski, Mon. Not. R. Astron. Soc. 350, 1022 (2004).
M.-A. Dupret, A. Thoul, R. Scuflaire, et al., Astron. Astrophys. 415, 251 (2004).
P. Degroote, C. Aerts, A. Baglin, et al., Nature 464, 259 (2010).
C. A. Meakin and D. Arnett, Astrophys. J. 667, 448 (2007).
C. A. Meakin and D. Arnett, Astrophys. Space Sci. 328, 221 (2010).
D. Arnett, C. A. Meakin, and P. A. Young, Astrophys. J. 690, 1715 (2009).
P. F. Linden, J. Fluid Mech. 71, 385 (1975).
L. D. Landau and E. M. Lifshitz, Course of Theoretical Physics, Vol. 6: Fluid Mechanics (Nauka, Moscow, 1986; Pergamon, New York, 1987).
B. Paczynski, Acta Astron. 20, 47 (1970).
E. I. Staritsin, Astron. Rep. 43, 592 (1999).
C. A. Iglesias and F. J. Rogers, Astrophys. J. 464, 943 (1996).
D. R. Alexander and J. Ferguson, Astrophys. J. 437, 879 (1994).
H. J. S. Fernando, Ann. Rev. Fluid Mech. 23, 455 (1991).
E. Bohm-Vitenze, Z. Astrophys. 46, 108 (1958).
E. I. Staritsin, Astron. Rep. 45, 467 (2001).
E. I. Staritsin, Astron. Lett. 35, 413 (2009).
E. I. Staritsin, Astron. Lett. 33, 93 (2007).
A. Miglio, J. Montalban, P. Eggenberger, and A. Noels, Astron. Nachr. 329, 529 (2008).
A. Miglio, J. Montalban, A. Noels, and P. Eggenberger, Mon. Not. R. Astron. Soc. 386, 1487 (2008).
J. Montalban, A. Miglio, P. Eggenberger, and A. Noels, Astron. Nachr. 329, 535 (2008).
A. Miglio, J. Montalban, and M.-A. Dupret, Mon. Not. R. Astron. Soc. 375, L21 (2007).
T. Zdravkov and A. A. Pamyatnykh, J. Phys. Conf. Ser. 118, 012079 (2008).
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © E.I. Staritsin, 2013, published in Astronomicheskii Zhurnal, 2013, Vol. 90, No. 5, pp. 420–431.
Rights and permissions
About this article
Cite this article
Staritsin, E.I. Turbulent entrainment at the boundaries of the convective cores of main-sequence stars. Astron. Rep. 57, 380–390 (2013). https://doi.org/10.1134/S1063772913050089
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1063772913050089