Relaxational effects in radiating stellar collapse

Megan Govender, Roy Maartens, Sunil D. Maharaj

Research output: Contribution to journalArticlepeer-review


Relaxational effects in stellar heat transport can in many cases be significant. Relativistic Fourier—Eckart theory is inherently quasi-stationary, and cannot incorporate these effects. The effects are naturally accounted for in causal relativistic thermodynamics, which provides an improved approximation to kinetic theory. Recent results, based on perturbations of a static star, show that relaxation effects can produce a significant increase in the central temperature and temperature gradient for a given luminosity. We use a simple stellar model that allows for non-perturbative deviations from staticity, and confirms qualitatively the predictions of the perturbative models.
Original languageEnglish
Pages (from-to)557-564
JournalMonthly Notices of the Royal Astronomical Society
Issue number2
Publication statusPublished - 1 Dec 1999


  • hydrodynamics
  • radiation mechanisms : thermal
  • relativity


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