Repository logo
Acerca de Depósito
  • Español
  • English
Log In
  1. Home
  2. Modules for Experiments in Stellar Astrophysics (MESA): Time-dependent Convection, Energy Conservation, Automatic Differentiation, and Infrastructure
 
  • Details

Modules for Experiments in Stellar Astrophysics (MESA): Time-dependent Convection, Energy Conservation, Automatic Differentiation, and Infrastructure

Journal
Astrophysical Journal, Supplement Series
Date Issued
2023-03-01
Author(s)
Jermyn, Adam S.
Bauer, Evan B.
Schwab, Josiah
Farmer, R.
Ball, Warrick H.
Bellinger, Earl P.
Dotter, Aaron
Joyce, Meridith
Marchant, Pablo
Mombarg, Joey S.G.
Wolf, William M.
Sunny Wong, Tin Long
Cinquegrana, Giulia C.
Farrell, Eoin
Smolec, R.
Thoul, Anne
Cantiello, Matteo
Herwig, Falk
TOLOZA CASTILLO, ODETTE FABIOLA  
Departamento de Física  
Bildsten, Lars
Townsend, Richard H.D.
Timmes, F. X.
DOI
10.3847/1538-4365/acae8d
Abstract
<jats:title>Abstract</jats:title>
<jats:p>We update the capabilities of the open-knowledge software instrument Modules for Experiments in Stellar Astrophysics (<jats:monospace>MESA</jats:monospace>). The new <jats:monospace>auto</jats:monospace>_<jats:monospace>diff</jats:monospace> module implements automatic differentiation in <jats:monospace>MESA</jats:monospace>, an enabling capability that alleviates the need for hard-coded analytic expressions or finite-difference approximations. We significantly enhance the treatment of the growth and decay of convection in <jats:monospace>MESA</jats:monospace> with a new model for time-dependent convection, which is particularly important during late-stage nuclear burning in massive stars and electron-degenerate ignition events. We strengthen <jats:monospace>MESA</jats:monospace>’s implementation of the equation of state, and we quantify continued improvements to energy accounting and solver accuracy through a discussion of different energy equation features and enhancements. To improve the modeling of stars in <jats:monospace>MESA</jats:monospace>, we describe key updates to the treatment of stellar atmospheres, molecular opacities, Compton opacities, conductive opacities, element diffusion coefficients, and nuclear reaction rates. We introduce treatments of starspots, an important consideration for low-mass stars, and modifications for superadiabatic convection in radiation-dominated regions. We describe new approaches for increasing the efficiency of calculating monochromatic opacities and radiative levitation, and for increasing the efficiency of evolving the late stages of massive stars with a new operator-split nuclear burning mode. We close by discussing major updates to <jats:monospace>MESA</jats:monospace>’s software infrastructure that enhance source code development and community engagement.</jats:p>
Subjects

Stellar physics (1621...

Stellar evolution (15...

Stellar evolutionary ...

Computational methods...

File(s)
Loading...
Thumbnail Image
Name

2208.03651v2.pdf

Size

3.07 MB

Format

Adobe PDF

Checksum

(MD5):1f5668d145dea83ed2cecf2115d1e4a4

UNIVERSIDAD

  • Nuestra Historia
  • Federico Santa María
  • Definiciones Estratégicas
  • Modelo Educativo
  • Organización
  • Información Estadística USM

CAMPUS Y SEDES

  • Información Campus y Sedes
  • Tour Virtual

EXTENSIÓN Y CULTURA

  • Dirección General de Comunicaciones
  • Dirección General de Vinculación con el Medio
  • Oficina de Asuntos Internacionales
  • Red de Ex-Alumnos
  • Noticias USM
  • Eventos USM
  • Radio USM
  • Cultura USM

SERVICIOS

  • Aula USM
  • Biblioteca USM
  • Portal de Autoservicio Institucional
  • Dirección de Tecnologías de la Información
  • Portal de Reportes UDAI
  • Sistema de Información de Gestión Académica
  • Sistema Integrado de Información Argos ERP
  • Sistema de Remuneraciones Históricas
  • Directorio USM
  • Trabaja con nosotros
Acreditación USM
usm.cl
Logo Acceso
Logo Consejo de Rectores
Logo G9
Logo AUR
Logo CRUV
Logo REUNA
Logo Universia

Built with DSpace-CRIS software - Extension maintained and optimized by 4Science

  • Cookie settings
  • Privacy policy
  • End User Agreement
  • Send Feedback