An adaptive code for radial stellar model pulsations

J. Robert Buchler, Z. Kolláth, Ariel Marom

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

We describe an implicit 1-D adaptive mesh hydrodynamics code that is specially tailored for radial stellar pulsations. In the Lagrangian limit the code reduces to the well tested Fraley scheme. The code has the useful feature that unwanted, long lasting transients can be avoided by smoothly switching on the adaptive mesh features starting from the Lagrangean code. Thus, a limit cycle pulsation that can readily be computed with the relaxation method of Stellingwerf will converge in a few tens of pulsation cycles when put into the adaptive mesh code. The code has been checked with two shock problems, viz. Noh and Sedov, for which analytical solutions are known, and it has been found to be both accurate and stable. Superior results were obtained through the solution of the total energy (gravitational + kinetic + internal) equation rather than that of the internal energy only.

Original languageEnglish
Pages (from-to)139-160
Number of pages22
JournalAstrophysics and Space Science
Volume253
Issue number1
Publication statusPublished - 1997

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stellar models
mesh
cycles
internal energy
kinetic energy
code
hydrodynamics
shock
kinetics
energy

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

An adaptive code for radial stellar model pulsations. / Buchler, J. Robert; Kolláth, Z.; Marom, Ariel.

In: Astrophysics and Space Science, Vol. 253, No. 1, 1997, p. 139-160.

Research output: Contribution to journalArticle

Buchler, JR, Kolláth, Z & Marom, A 1997, 'An adaptive code for radial stellar model pulsations', Astrophysics and Space Science, vol. 253, no. 1, pp. 139-160.
Buchler, J. Robert ; Kolláth, Z. ; Marom, Ariel. / An adaptive code for radial stellar model pulsations. In: Astrophysics and Space Science. 1997 ; Vol. 253, No. 1. pp. 139-160.
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