Updated and Expanded OPAL Equation-of-State Tables: Implications for Helioseismology

By F. Rogers, A. Nayfonov. 2002

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View Paper: https://www.semanticscholar.org/paper/a79cdff17c7125910232e0143c60123e75f8f241

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In Astronomy and Astrophysics

Citations in the corpus

Stellar ages and masses in the solar neighbourhood: Bayesian analysis using spectroscopy and Gaia DR1 parallaxes (2018, methodology): “The equations of state are taken from Rogers & Nayfonov (2002), Saumon et al. (1995) and Timmes & Swesty (2000).”
Helioseismology and Solar Abundances (2007, methodology): “They were constructed using the OPAL equation of state (Rogers & Nayfonov 2002) and OPAL opacities (Iglesias & Rogers 1996).”
Constraints from Gravitational-wave Detections of Binary Black Hole Mergers on the 12C(α, γ)16O Rate (2020, methodology): “The EOS is a blend of the OPAL (Rogers & Nayfonov 2002), SCVH (Saumon et al. 1995), PTEH (Pols et al. 1995), HELM (Timmes & Swesty 2000), and PC (Potekhin & Chabrier 2010) EOSs.”
The chemical composition of the Sun (2009, background): “The uncertainty essentially reflects the difference between the MHD (Mihalas, Däppen & Hummer 1988) and OPAL (Rogers & Nayfonov 2002) equation-of-state, but there is also a minor dependence on the assumed metallicity of the reference solar model for the inversion (Trampedach, Däppen & Baturin 2006”
YREC: the Yale rotating stellar evolution code (2007, methodology): “The current version uses the latest OPAL opacities (Iglesias and Rogers 1996) and OPAL equation of state (Rogers and Nayfonov 2002).”
A New Generation of Standard Solar Models (2016, methodology): “We have performed a comparison between the two EoS, with the composition fixed to the six element mixture hardwired in OPAL EoS, and found differences smaller than 0.1% for the pressure or 0.02% for Γ1.”
Ages and fundamental properties of Kepler exoplanet host stars from asteroseismology (2015, background): “The basic input physics common to all grids includes the 2005 version of the OPAL Equation of State (Rogers, Swenson & Iglesias 1996; Rogers & Nayfonov 2002), OPAL opacities for high temperatures (Iglesias & Rogers 1996) and those of Ferguson et al. (2005) for low temperatures, the NACRE…”
Solar Neutrinos: Status and Prospects (2012, background): “Thus modern opacity tables like OPAL (Rogers & Nayfonov 2002) are based on detailed atomic input.”
The Geneva stellar evolution code (2008, methodology): “Two different equations of state are included in the Geneva evolution code for solar-type stars models: the MHD equation of state (Hummer and Mihalas 1988; Mihalas et al. 1988; Daeppen et al. 1988) and the OPAL equation of state (Rogers et al. 1996; Rogers and Nayfonov 2002).”
MODULES FOR EXPERIMENTS IN STELLAR ASTROPHYSICS (MESA) (2010, methodology): “T tables are based on the 2005 update of the OPAL EOS tables (Rogers & Nayfonov 2002).”
A Large Stellar Evolution Database for Population Synthesis Studies. I. Scaled Solar Models and Isochrones (2004, result): “…spanned by our present models); the accuracy of this EOS is similar to the case of the OPAL EOS (Rogers et al. 1996)—and recently updated in the treatment of some physical inputs (Rogers & Nayfonov 2002)—which, however, does not allow the full coverage of the stellar models presented in this work.”
TESTING A PREDICTIVE THEORETICAL MODEL FOR THE MASS LOSS RATES OF COOL STARS (2011, methodology): “We used the 2005 release of OPAL plasma equations of state3 (see also Rogers & Nayfonov 2002) to estimate the mean atomic weightµ in a partially ionized photosphere.”
The Pisa pre-main sequence tracks and isochrones - A database covering a wide range of Z, Y, mass, and age values (2011, methodology): “We adopted the most updated version of the OPAL EOS2 in the version released in 2006 (Rogers et al. 1996; Rogers & Nayfonov 2002).”
Evolution of Stars and Stellar Populations (2005, methodology): “An alternative way to determine the EOS – that we do not discuss here – is to follow the so-called ‘physical picture’ described, for example, in [165].”
A UNIFORM ASTEROSEISMIC ANALYSIS OF 22 SOLAR-TYPE STARS OBSERVED BY KEPLER (2012, methodology): “The models in the grid were constructed using the OPAL equation of state (Rogers & Nayfonov 2002), OPAL opacity tables (Iglesias & Rogers 1996) augmented at low temperatures by Alexander & Ferguson (1994), and the solar mixture of Grevesse & Sauval (1998).”