Relaxational effects in radiating stellar collapse

Abstract

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.

10 pages

References in corpus (5)

• A causal model of radiating stellar collapse
• Gravitational collapse: A case for thermal relaxation
• Estimating beta from redshift-space distortions in the 2dF galaxy survey
• Acoustic oscillations and viscosity
• Inflation driven by causal heat flux

Cited by in corpus (22)

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• Some analytical models of radiating collapsing spheres
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• Why Gravitational Contraction Must be Accompanied by Emission of Radiation Both in Newtonian and Einstein Gravity
• Collapsing shear-free perfect fluid spheres with heat flow
• Thermo--inertial bouncing of a relativistic collapsing sphere: A numerical model
• Nonlinear Shear-free Radiative Collapse
• A Riccati equation in radiative stellar collapse
• Stability and gravitational collapse of neutron stars with realistic equations of state
• The role of shear in dissipative gravitational collapse
• Higher order moments of the density field in a parameterized sequence of non-gaussian theories
• On the effective inertial mass density of a dissipative fluid
• Thermal Behaviour of Euclidean Stars
• Radiating-collapsing models satisfying Karmarkar condition
• Gravitationally collapsing stars in $f(R)$ gravity
• Dynamical conditions and causal transport of dissipative spherical collapse in $f(R,T)$ gravity
• Verification of the diffusive shock acceleration in Mrk 501
• Causal thermodynamics of a gravitational collapse model for an anisotropic fluid with dissipative flows
• Collapse in $f(R)$ gravity and the method of $R$ matching
• Dissipative Cylindrical Collapse of a Charged Anisotropic Fluid in $f(R)$ Gravity
• Effects of electromagnetic field on a radiating star