A novel analytic atmospheric T(τ) relation for stellar models

Research output: Contribution to journalArticlepeer-review

Authors

Colleges, School and Institutes

Abstract

Stellar models often use relations between the temperature T and optical depth τ to evaluate the structure of their optically thin outer layers. We fit a novel analytic function to the Hopf function q(τ) of a radiation-coupled hydrodynamics simulation of near-surface convection with solar parameters by Trampedach et al. The fit is accurate to within 0.82% for the solar simulation and to within 13% for all the simulations that are not on either the low-temperature or low-gravity edges of the grid of simulations.

Bibliographic note

Funding information: W.H.B. thanks the UK Science and Technology Facilities Council (STFC) for support under grant ST/R0023297/1. Funding for the Stellar Astrophysics Centre is provided by The Danish National Research Foundation (grant agreement No.: DNRF106).

Details

Original languageEnglish
Article number7
Number of pages3
JournalResearch Notes of the AAS
Volume5
Issue number1
Publication statusPublished - 12 Jan 2021

Keywords

  • Stellar atmospheres, Stellar physics, Stellar structures, Stellar surfaces