TESTING THE CORE OVERSHOOT MIXING DESCRIBED BY A TURBULENT CONVECTION MODEL ON THE ECLIPSING BINARY STAR HY VIR

@article{Zhang2012TESTINGTC,
  title={TESTING THE CORE OVERSHOOT MIXING DESCRIBED BY A TURBULENT CONVECTION MODEL ON THE ECLIPSING BINARY STAR HY VIR},
  author={Q. S. Zhang},
  journal={The Astrophysical Journal},
  year={2012},
  volume={761}
}
  • Q. S. Zhang
  • Published 1 November 2012
  • Physics
  • The Astrophysical Journal
Helioseismic investigation has suggested applying turbulent convection models (TCMs) to convective overshoot. Using the turbulent velocity in the overshoot region determined by a TCM, one can deal with overshoot mixing as a diffusion process, which leads to incomplete mixing. It has been found that this treatment can improve solar sound speed and Li depletion in open clusters. In order to investigate whether the TCM can be applied to overshoot mixing outside the stellar convective core, new… 
CONVECTIVE OVERSHOOT MIXING IN MODELS OF THE STELLAR INTERIOR
Convective overshoot mixing plays an important role in stellar structure and evolution. However, overshoot mixing is also a long-standing problem; it is one of the most uncertain factors in stellar
MODELING CONVECTIVE CORE OVERSHOOT AND DIFFUSION IN PROCYON CONSTRAINED BY ASTEROSEISMIC DATA
We compare evolved stellar models, which match Procyon's mass and position in the HR diagram, to current ground-based asteroseismic observations. Diffusion of helium and metals along with two
On the role of doubly-diffusive mixing in low-mass red giant branch stars
The purpose of this thesis is to investigate mixing in red-giant stars. Thanks particularly to the observations of globular clusters, it is clear that that standard stellar evolution fails to
Asteroseismic Analyses of Slowly Pulsating B Star KIC 8324482: Ultraweak Element Mixing beyond the Central Convective Core
Asteroseismology is a powerful tool for probing the inner structure and determining the evolutionary status and the fundamental parameters of stars. The oscillation spectra of slowly pulsating B
The YNEV stellar evolution and oscillation code
We have developed a new stellar evolution and oscillation code YNEV, which calculates the structures and evolutions of stars, taking into account hydrogen and helium burning. A nonlocal turbulent
On the uncertain nature of the core of α Cen A
High-quality astrometric, spectroscopic, interferometric and, importantly, asteroseismic observations are available for $\alpha$ Cen A, which is the closest binary star system to earth. Taking all
ASTEROSEISMIC ANALYSIS OF THE CoRoT TARGET HD 49933
The frequency ratios r10 and r01 of HD 49933 exhibit an increase at high frequencies. This behavior also exists in the ratios of other stars, which is considered to result from the low
Asteroseismic analysis of the CoRoT target HD 169392
The satellite CoRoT (Convection, Rotation, and planetary Transits) has provided high-quality data for almost six years. We show here the asteroseismic analysis and modeling of HD169392A, which
Convection Theory and Relevant Problems in Stellar Structure, Evolution, and Pulsational Stability I Convection Theory and Structure of Convection Zone and Stellar Evolution
  • D. Xiong
  • Physics
    Frontiers in Astronomy and Space Sciences
  • 2020
A non-local and time-dependent theory of convection was briefly described. This theory was used to calculate the structure of solar convection zones, the evolution of massive stars, lithium depletion
Upward Overshooting in Turbulent Compressible Convection. I. Effects of the Relative Stability Parameter, the Prandtl Number, and the Péclet Number
  • T. Cai
  • Physics
    The Astrophysical Journal
  • 2020
In this paper, we investigate the upward overshooting by three-dimensional numerical simulations. We find that the above convectively stable zone can be partitioned into three layers: the thermal
...
...

References

SHOWING 1-10 OF 26 REFERENCES
TURBULENT CONVECTION MODEL IN THE OVERSHOOTING REGION. I. EFFECTS OF THE CONVECTIVE MIXING IN THE SOLAR OVERSHOOTING REGION
The overshooting in the framework of the turbulent convection model is investigated in the solar overshooting region. The overshooting mixing is treated as a diffusive process. It is found that the
Turbulence properties in the solar convection envelope: properties of the overshooting regions ⁄
We apply the turbulent convection model (TCM) to investigate properties of turbulence in the solar convective envelope, especially in overshooting regions. The results show TCM gives negative
Testing turbulent convection theory in solar models – I. Structure of the solar convection zone
Turbulent convection models (TCMs) based on hydrodynamic moment equations are compared with the classical mixing-length theory (MLT) in solar models. The aim is to test the effects of some physical
A more realistic representation of overshoot at the base of the solar convective envelope as seen by helioseismology
The stratification near the base of the Sun’s convective envelope is governed by processes of convective overshooting and element diffusion, and the region is widely believed to play a key role in
TURBULENT CONVECTION MODEL IN THE OVERSHOOTING REGION. II. THEORETICAL ANALYSIS
Turbulent convection models (TCMs) are thought to be good tools to deal with the convective overshooting in the stellar interior. However, they are too complex to be applied to calculations of
The diffusive overshooting approach to Li abundance in clusters
Helioseimic investigation shows that convective overshooting can penetrate 0.37H(P) to the location where the temperature is 2.5 x 10(6) K, which is the typical temperature of the reaction Li-7(p,
A k–ω MODEL FOR TURBULENTLY THERMAL CONVECTION IN STARS
Both observations and numerical simulations show that stellar convective motions are composed of semi-regular flows of convective rolling cells and a fully developed turbulence. Although the
Does convective core overshooting depend on stellar mass? Tests using double-lined eclipsing binaries
Aims. We have selected 13 double-line eclipsing binary systems (DLEBS), strategically positioned in the HR diagram, to infer the mass dependence of the core overshooting parameter αov. Methods. In
Convective Overshooting in Stellar Interior Models
ABS>The question of overshooting from interior convective cores in stellar models is examined in the framework of a simplified nonlocal mixing- length model for convection. The most important results
The structure of the solar convective overshooting zone
Using a non-local theory of convection, we calculated the structure of the solar convection zone, paying special attention to the detailed structure of the lower overshooting zone. Our results show
...
...