Astrophysics (Index)About

radiative transfer

(energy transfer in the form of electromagnetic radiation)

Radiative transfer is the transfer of energy via electromagnetic radiation (EMR) through a gas or plasma, in particular, for a gas not so transparent that EMR merely misses all impediments. For such a less-than-transparent gas, absorption, emission, and scattering of the constituent atoms are basic to the process.

Radiative transfer is characterized by the quantity radiance, the rate of energy flowing at a given time through a given area at a given location. Spectral radiance, in turn, is the radiance at a given wavelength.

An equation of radiative transfer is an equation that describes this process, relating the transmission of energy to quantities characterizing the likelihood of absorption, emission, and scattering.

Further reading:

Referenced by pages:
atmospheric model
Compton scattering
computational astrophysics
cooling function
cross section
energy density
giant star
kappa mechanism (κ-mechanism)
mean free path
random walk
radiation hydrodynamics (RHD)
radiative transfer code (RT code)
equation of radiative transfer (RTE)
radiative transfer model (RTM)
Schuster-Schwarzschild model
Sobolev approximation
stellar structure
synchrotron radiation
thermodynamic equilibrium (TE)
Thomson scattering
two-stream approximation
white dwarf (WD)