SIMBAD references

2018ApJ...858...28V - Astrophys. J., 858, 28-28 (2018/May-1)

Investigating the metallicity-mixing-length relation.

VIANI L.S., BASU S., ONG J.M.J., BONACA A. and CHAPLIN W.J.

Abstract (from CDS):

Stellar models typically use the mixing-length approximation as a way to implement convection in a simplified manner. While conventionally the value of the mixing-length parameter, α, used is the solar-calibrated value, many studies have shown that other values of α are needed to properly model stars. This uncertainty in the value of the mixing-length parameter is a major source of error in stellar models and isochrones. Using asteroseismic data, we determine the value of the mixing-length parameter required to properly model a set of about 450 stars ranging in log g, Teff, and [Fe/H]. The relationship between the value of α required and the properties of the star is then investigated. For Eddington atmosphere, non-diffusion models, we find that the value of α can be approximated by a linear model, in the form of α/α=5.426–0.101log(g)-1.071log(Teff)+0.437([Fe/H]). This process is repeated using a variety of model physics, as well as compared with previous studies and results from 3D convective simulations.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): stars: fundamental parameters - stars: interiors - stars: oscillations including pulsations

VizieR on-line data: <Available at CDS (J/ApJ/858/28): table3.dat>

Simbad objects: 459

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2019.09.22-17:28:01

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